マリオカート８

Mario Kart 8/ja
開発元: Nintendo EAD, Bandai Namco 発売元: Nintendo プラットフォーム: Wii U 日本での発売日: 2014年5月29日 アメリカでの発売日: 2014年5月30日 ヨーロッパでの発売日: 2014年5月30日 オーストラリアでの発売日: 2014年5月31日 ブラジルでの発売日: 2014年5月30日 このゲームには、以下の要素が含まれています。 未使用のエリア 未使用のグラフィック 未使用のモデル 地域による違い バージョンによる違い

Mario Kart 8 features new anti-gravity mechanics and the return of gliders and underwater racing from the previous game. Also Koopalings.

The game was later ported to the Nintendo Switch as Mario Kart 8 Deluxe. While the base game is largely the same, it did receive a number of balance tweaks and new features, such as the ability to hold two items at once, a revamped Battle Mode with new courses, six new playable characters (including the Inklings from Splatoon), and three new vehicles.

To do: Music oddity Unused Red Yoshi render, edited from a MKWii render.

Sub-Pages

Prerelease Info (untranslated)

Kiosk Demo (April 4th, 2016)

Unused Tracks

Test

This unused track is found at ID 0x01. It's a copy of Mario Circuit from the Flower Cup, but without music. Additionally, the orange arrow signs are not animated. According to interviews, Mario Circuit was the first track designed for this game, so this is very likely intended for testing. It works the same in Battle Mode as well.

It is possible that this was the course used for rendering the demo videos in the menu, since the arrow signs there are not animated either.

ReservedXX

Unused tracks that are found in IDs 0x02 to 0x0F, where XX is a number, starting at 01, going upwards. The game crashes when they are loaded.

UnderConstructionXX

More unused tracks in IDs 0x30 to 0x4F. It is similar to ReservedXX, where the XX is a number, starting at 01. They also crash when loaded.
If DLC packs 1+2 are downloaded, IDs 0x30 to 0x42 will load the DLC tracks. 0x43 to 0x4F will still result in a crash.

未使用のモデル

ピンク色のキノピオ

There is an unused pink colored Toad, which is meant to be seen in N64 Rainbow Road with the others.

Fruit Basket

TEST_FruitBasketB

A model internally labelled as TEST_FruitBasketB. The textures used for the basket and fruits are obviously meant for tests, as they are simple rectangles with solid color and border.

(Source: MrBean35000vr (Discovery))

N64 Tree

N64Tree

A model named N64Tree is a low-quality tree roughly based on the ones from Mario Raceway in Mario Kart 64. This model is notably different from the similarly-named model found in Mario Kart 7 and different in shape from the trees used for Mario Raceway in Mario Kart Wii.

(Source: MrBean35000vr (Discovery), Catley (model))

Snowless Mount Wario Tree

TreeTri

There is a non-snowy version of the trees everyone crashes against on Mount Wario. It is named TreeTri and correctly listed in the object table with ObjId 5019. While this model is technically used in N64 Toad's Turnpike and 3DS Wuhu Town in Mario Kart 8 Deluxe they are baked into the main model of the course, implying that this object would be once interacted with similar to other tree object counter parts that produce particle or sound effects when hit.

A similar object in appearance was later used on Hyrule Circuit as DL_TreeTri, the only main difference having different textures than of it's unused counterpart.

Yellow Pylon

PylonY

While red and blue pylons/cones are seen throughout the game, there's also a yellow version which is not used on any track. It is correctly listed in the object table as PylonY (ObjId 1009).

These cones were eventually used in Mario Kart 8 Deluxe on the SNES Battle Course 1 stage.

Unused Pipes not Housing Piranha Plants

There are some pipes that are only seen in combination with a Piranha Plant. Versions without the plants exist anyway and go unused. This might implicitly tell that more pipes were once placed on track, or fewer pipes originally had plants in them.

DokanCake

Meant for Sweet Sweet Canyon, having a sugar frosting texture. There are 2 pipes with Piranha Plants on track. It is correctly listed in the object table as DokanCake (ObjId 1076).

DokanHone

Meant for Bone Dry Dunes, having a slightly muddier green. There are 2 pipes with Piranha Plants on track. It is correctly listed in the object table as DokanHone (ObjId 1105).

Start Flag

This generic start flag simply called FlagStartMario (ObjId 5024) goes unused. It looks like a modern version of the start flag used in GBA Mario Circuit, but the final version uses the classic Mario Kart font on it and slightly different coloring.

Blue Goomba

A blue Goomba named KuriboBlue, note that it seems to be an earlier model compared to the normal Goomba. It might have been intended for Piranha Plant Slide, as in MK7 the Goombas in the underground section are blue as a homage to Super Mario Brothers.

Airships

DesertSandShip

An airship model named DesertSandShip. Similar to other airship objects used in Cloudtop Cruise and Bowser's castle this object seems to have been originally intended for Bone-Dry Dunes as decoration, however lacks any animations. While ships do appear on the course they are sandships that ride on the flowing sand of the course, none appear flying in the sky. Notably the model is a direct port from Super Mario 3D Land.

Mcairship

A second unused airship model named Mcairship, which is the same as the others but with darker shading. From the name this airship was once used as decoration in Mario Circuit.

Early Balloon

BattleBalloon

An early balloon model with the same name as the final's, BattleBalloon. This one uses the style from the earlier games. It has an animation for all of it's colors. The early model is located in mapobj/BattleBalloon, and the final is in race_common/BattleBalloon.

Audience Group

CmnGroupAudience

Oddly positioned Toads and Shy Guys named CmnGroupAudience. They have bones, but no animations assigned to them.

Flat Grass Model

Bake

A flat grass model simply named Bake. Based on the texture names having "Tree64Yoshi", it was probably meant for testing bake maps using the Yoshi Valley tree.

Early Flag

FlagTriangle

An early star flag model named FlagTriangle. It has a single animation for flapping in the wind. The final model is called FlagTriangle1.

Early Trolley Gates

Two separate models for the Trolley toll gates at Toad Harbor named TrolleyGateLeft and TrolleyGateRight respectively. They have a single animation for opening. The final one is named TollBar.

Early Tick-Tock Clock Gears

Early Tick-Tock Clock gear decorations named GearDecoA-G respectively. They all have an animation assigned to them, while GearDecoD has two animations, which seem to be a duplicate of GearDecoE's animation. The final is all in a single object in GearDeco.

Early Iceberg

DL_IcebergA/B

An early iceberg model meant for Ice Ice Outpost named DL_IcebergA. It has a single animation for collapsing. There's another one named DL_IcebergB, but it's a duplicate of A's.

Moving Roads

MovingRoad

A simple flat road meant for testing the wavy roads named MovingRoad. It uses a test texture with 2m written on the squares.

MovingRoad2

Another flat, longer road named MovingRoad2. This one uses a metal texture instead of the 2m texture.

MovingRoad3

A tube road most likely meant for testing a spinning road named MovingRoad3. This one uses the 2m texture.

MovingRoad4

The final moving road test named MovingRoad4. This one seems to be another spinning road test, since it does have 4 sides.

Music Piranha Plant

PackunMusic

This Piranha Plant is meant for Music Park, however Music Park uses PackunFlower's model, but the object itself is called PackunMusic. PackunMusic's model is the piranha plant model ripped from MK7, so this one doesn't get used. It has the same animations that were used in MK7 as well.

Wii Tree

WiiTree1

This unused tree is a higher quality version of the dancing trees from Mario Kart Wii, named WiiTree1. It has the same dancing animation from Mario Kart Wii as well. It also uses an earlier version of the bfres format.

Early SNES Rainbow Road Arrow

DL_RainbowArrow

An early arrow meant for SNES Rainbow Road named DL_RainbowArrow. It seems like they were going to go for a more 8-bit style arrow.

Unused Koopa

T_Nokonoko

An unused Koopa model named T_Nokonoko. This Koopa was meant for the Trolleys at Toad Harbor, but instead a Koopa model is included with the Trolley object. This one also has an early animation, which instead the Koopa just doesn't wave it's hands.

Early Pitcrew Toad

Early	Final

An early Pitcrew Toad meant for Wario Stadium named PitToadW. The color for this one represents more of Wario's overalls rather than the final's. It also doesn't open it's mouth. The final one is named PitToadWro.

Rotation Road

RotationRoad1

An unused road representing a gear model named RoadRotation1. This was most likely meant to test the rotating gears at Tick-Tock Clock.

Unused Skyboxes

There are several skyboxes which are not referenced in any track.

VRfair

VRfair (ObjId 7006) is a rather generic cloudy sky, but with a weird yellow tint towards the horizon.

VRcloudSea

VRcloudSea (ObjId 7012) is the original version and now an unused duplicate of Mario Circuit's sky, with the Mario Circuit's sky containing the same original material names and textures as VRcloudSea.

VRCustomizer

VRCustomizer (ObjId 7030) is a unicolor, light blue sky. The name might suggest it was seen in a track editor as a placeholder until the real skybox was created.

VRClock

While VRClock (ObjId 7034) is actually referenced in Tick-Tock Clock and Super Bell Subway, they are never seen as the track model completely encases the racers. It is a unicolor dark blue box.

VRMenu (reflection map)

VRMenu (ObjId 7025), referenced in the internally used track Gu_Menu to draw the menu background, is not rendered when used on tracks. It only consists of the reflection map which can be indirectly seen on karts in the character and parts selection screens. On tracks, it results in no skybox being drawn at all, leaving traces of models previously rendered in front of the sky. The reflection map represents an empty hall with a lot of pillars. The game uses special coding for VRMenu, since when removing or replacing it in Gu_Menu, no menu background graphics like the main menu characters or the blue backgrounds are drawn anymore, and the whole online lobby will not be rendered at all - only the UI above remains.

Additionally, there are skyboxes listed as DL_VRAnimalSpring (ObjId 7054) and DL_VRAnimalWinter (ObjId 7055) in the object dictionary. These would've obviously been used for the spring and winter seasons of the Animal Crossing track, but spring reuses VRWaterPark and winter VRSherbet instead. They either have no data or the game doesn't render them too, as placing them in a track result in the same effects as with VRMenu.

未使用画像

To do: Apparently, there are more unused graphics.

Menu Graphics

tc_MnOpen_Sample^l.bflim

A placeholder version of the default title screen image.

(Source: NWPlayer123)

ym_awardbg_dlc_course_??^o.bflim

A placeholder for snapshots of 16 DLC tracks to be shown as the background in Grand Prix result screens of the corresponding cups, existing in version 1.0 of the game. Named from ym_awardbg_dlc_course_00^o.bflim to ym_awardbg_dlc_course_15^o.bflim.

A placeholder snapshot of Mario Circuit for the results screen.

An unused START! icon, in game it says GO!

There are four unused cup icons. They reuse older artwork for the central objects and lack the same extra decorations that the normal icons have. Their file names refer to them as CupIconDLC00 through CupIconDLC03, indicating that these were placeholders for the DLC cups. Of the 4 released DLC cups, only the Yoshi Egg ended up getting used (albeit with a brand new icon). However, the Spiny Blue Shell also found its way into the Switch port's Booster Course Pass DLC, also with a revamped icon. These seem to imply the initial DLC was set to be more focused on purely the Mario franchise, rather than crossing over (no pun intended) with the Legend of Zelda and Animal Crossing series.

Two unused stamps. The first is a placeholder and the second is an early version of Pink Gold Peach's stamp missing the shading.

An early kart icon for the Pipe Frame. In this icon, the vehicle in question uses a design more closely resembling that seen in previous games than its final design in this one.

Five unused kart icons for a 13th Mii variant. The kart's variant relies on what color a player's Mii is, but there are only 12 colors to choose from. All five of the icons are placeholders using graphics from Mario Kart 7.

Icons for two planned variations of the Prancer. The Prancer is a vehicle for Peach, and since Rosalina and Daisy have alterations of Peach's vehicle parts, they were most likely planned for them. Both icons are placeholders.

Object Textures

emblem_kmc.gtx

An unused emblem for either Kamek or a generic Magikoopa. Neither appears as a playable character in the finished game or DLC packs, so he was probably scrapped during development. Kamek also appeared in pre-release screenshots of Mario Kart 64 (then called "Super Mario Kart R").

Kamek would go on to join the playable roster of Mario Kart Tour, where he does indeed use this emblem.

emblem_amt.gtx

A generic emblem with the logo eight is included in the emblem folder, but goes unused. It is indirectly seen in pre-rendered graphics for the kart previews.

emblem_dummy.gtx

A placeholder texture for kart emblems found inside most kart model files.

jugemobjlaplight_emm.2.gtx

Lakitu contains a texture showing a final lap or section 2 (hence the 2 is golden), but the final game always displays the 3/3 board for the last lap or section, no matter the number of total laps (except for 7 laps which it handles correctly to support Baby Park). However, during E3 2013, there were Mario Kart 8 demos in which people could try out Mario Kart 8 before its release - all races that were in the demo only had two laps, which required the use of this graphic.

How the placeholder lap graphics look in-game when setting a track to 5 laps

In version 2.0, until version 4.0, Lakitu had placeholder lap graphics for 5 laps, using a basic font, most likely for testing. These do actually appear if a track is set to 5 laps in version 2.0 and 3.0, until GCN Baby Park was added in 4.0, which added the 7 lap graphics instead. 5 laps was also the limit in this version. Anything higher would crash the game when crossing the finish line.

Crude textures made for the Standard Mii Glider. Both colors were dependent on which sex the Mii was; blue for female and red for male.

Track Textures

Early	Used

The computer screens in Rainbow Road have 8 frames of animation, but a 9th animation frame is present. This last frame is actually an early version of the first frame. The bar charts are all empty, the infoboxes use solid lines instead of fake text, and the blue glow around the edges is missing. The Blooper shuttle is shown with different lighting and with a parallel projection, but the model itself appears to be the same. The space station is displayed at a different angle and has no textures or background. It is possible that this was a stylistic choice and does not necessarily indicate that the image was made before the texturing of the course was complete.

ct_house_window_alb.gtx

There are two copies of the building windows texture in Toad Harbor, one of which has big red numbers in the place of where the posters should go. The positioning of the numbers don't match the final poster placement and seem to indicate that taller or thinner posters were planned. There is also a small white and blue image next to the eighth spot. The texture itself is used on all of the windows outside of the marketplace area, and was likely left in due to the windows being identical in both versions.

nasi_06_02.gtx

This is how Gu_Menu looks with front face culling disabled.

The internally used track Gu_Menu actually consists of a finite small plane on which karts are placed at race start, which is also correctly textured with a test texture. This plane is not visible when running the track as the material defines to cull both back and front faces rather than only back faces. Together with no skybox being added as an object, only drawing artifacts are visible around racers.

dueb_hy_signboard01_Alb.gtx

A placeholder signboard texture found alongside a number of other signboard textures for the Excitebike track. The text on the bottom left translates to "※4:1 Non-Sign Logo Variation".

(Translations: Glitterberri)

未使用/テスト・アイテム

テストアイテム

In the item slot table file ItemSlotTable.byaml, there are two test items called Test3 and Test4. Most likely, these items are holdovers (and serve the same lack of purpose) as the same-name items in Mario Kart 7.

Lucky Seven Leftover

In the Item Slot Table file ItemSlotTable.byaml, there is an item called Seven. It could just be a leftover for testing the Crazy 8 during development and they forgot to change the name.

Fake Item Box Leftover

In the file RaceLogData.exbin, appears the text "FakeBox" as well as all other known cut items. Since it is only referred to in that file, players can assume that they cut it really early in development.

Super Leaf Leftover

In the file RaceLogData.exbin, appears the text "Tail" as well as all other known cut items. Since it is only referred to in that file, players can assume that they cut it really early in development.

Disabled Glider Closing

Glider closing with B button from Mario Kart 7 is present in Mario Kart 8/Deluxe but it is not possible to perform because the game clears the B button input when in a glider. By removing this check, the glider can be closed by pressing B, showing that the function is left in the game and working perfectly, but not performable because of the input clear. This was discovered by Marioiscool246, who also made the cheat code to enable this feature back.

Shy Guy Bazaar

In version 2.0 of the game, present in AICourseTable_GP.byaml and AICourseTable_VS.byaml, as well as the game's code, is references for Shy Guy Bazaar (D3ds_SandTown). Shy Guy Bazaar was most likely planned to be DLC in favor of Neo Bowser City, but didn't get that far in development, since it's only a few references. All of the DLC tracks were also present in the code at this time as well, except for the seasonal Animal Crossing tracks, being only Du_Animal.

Regional Differences

Like Mario Kart 7, many tracks and parts have name differences between versions:

Track Names

The names for tracks are mostly the same between Japanese and English, standard localization aside. Retro tracks keep any name changes from the games they originated from. For example, Music Park is called Melody Motorway in the European version. For the Animal Crossing course, the Japanese version uses the game's Japanese title.

日本語	European	American
Sweets Canyon (スイーツキャニオン)	Sweet Sweet Canyon	Sweet Sweet Canyon
Toad Harbor (キノピオハーバー)	Toad Harbour	Toad Harbor
Shy Guy Mine (ヘイホーこうざん)	Shy Guy Falls	Shy Guy Falls
Dolphin Cape (ドルフィンみさき)	Dolphin Shoals	Dolphin Shoals
Electro Dream (エレクトロドリーム)	Electrodrome	Electrodrome
Wario Snow Mountain (ワリオスノーマウンテン)	Mount Wario	Mount Wario
Sky Garden (スカイガーデン)	Cloudtop Cruise	Cloudtop Cruise
Bone Bone Desert (ホネホネさばく)	Bone Dry Dunes	Bone-Dry Dunes
Koopa Castle (クッパキャッスル)	Bowser's Castle	Bowser's Castle
Moo Moo Country (モーモーカントリー)	Moo Moo Meadows	Moo Moo Meadows
Kinopio Highway (キノピオハイウェイ)	Toad's Turnpike	Toad's Turnpike
Crispy Desert (カラカラさばく)	Dry Dry Desert	Dry Dry Desert
Donut Plain 3 (ドーナツへいや３)	Donut Plains 3	Donut Plains 3
Peach Circuit (ピーチサーキット)	Royal Raceway	Royal Raceway
Music Park (ミュージックパーク)	Melody Motorway	Music Park
Tick TaClock (チックタックロック)	Tick-Tock Clock	Tick-Tock Clock
Piranha Slider (パックンスライダー)	Piranha Plant Pipeway	Piranha Plant Slide
Rumbling Volcano (グラグラかざん)	Grumble Volcano	Grumble Volcano
Excitebike (エキサイトバイク)	Excitebike Arena	Excitebike Arena
Dragon Road (ドラゴンロード)	Dragon Driftway	Dragon Driftway
Slippery Twister (ツルツルツイスター)	Ice Ice Outpost	Ice Ice Outpost
Wario Mine (ワリオこうざん)	Wario's Gold Mine	Wario's Gold Mine
Nature Road (ネイチャーロード)	Wild Woods	Wild Woods
Doubutsu no Mori (どうぶつの森)	Animal Crossing	Animal Crossing
Neo Koopa City (ネオクッパシティ)	Koopa City	Neo Bowser City
Ring Ring Metro (リンリンメトロ)	Super Bell Subway	Super Bell Subway

An odd oversight as a result of this is that the signs in the European versions of "Music Park" and "Neo Bowser City" still use their American names.

Retro Track Systems

Keeping with their Retro Track Naming traditions started in Mario Kart DS, there is a slight difference in the initials used to indicate which system a retro track originated from between the Japanese version and other versions.

Japanese	International
SFC	SNES
GC	GCN

Bodies

Japanese	European	American
Skeleton (スケルトン)	Pipe Frame	Pipe Frame
G Force (Ｇフォース)	Mach 8	Mach 8
Steel Diver (スティールダイバー)	Steel Driver	Steel Driver
Cat Classical (ネコクラシカル)	Cat Cruiser	Cat Cruiser
Turbo One (ターボ・ワン)	Circuit Special	Circuit Special
Tri-Mush (トライマッシュ)	Tri-Speeder	Tri-Speeder
Beat Demon (ビートデイモン)	Badwagon	Badwagon
Princess Coach (プリンセスコーチ)	Prancer	Prancer
Pata Tenten (パタテンテン)	Buggybud	Biddybuggy
Koopa Ship (クッパシップ)	Landship	Landship
Sneakart (スニーカート)	Bounder	Sneeker
Superstar (スーパースター)	Sports Coupé	Sports Coupe
Gold Kart (ゴールドカート)	Gold Kart	Gold Standard
Super Comet (スーパーコメット)	Comet	Comet
Mach GP (マッハＧＰ)	Sport Bike	Sport Bike
Maximum (マキシマム)	The Duke	The Duke
Burning Bowl (バーニングボウル)	Flame Rider	Flame Rider
Moto-Dozer (モト・ドーザー)	Varmint	Varmint
Soramame (そらまめ)	Mr. Scooty	Mr. Scooty
Jet Rider (ジェットライダー)	Jet Bike	Jet Bike
Standard ATV (スタンダードＡＴＶ)	Standard Quad	Standard ATV
Hana-chan Buggy (ハナチャンバギー)	Wild Wiggler	Wild Wiggler
Kuma Ride (くまライド)	Teddy Buggy	Teddy Buggy
Tanuki Buggy (タヌキバギー)	Tanooki Kart	Tanooki Kart
B Dash (Ｂダッシュ)	B Dasher	B Dasher
Master Bike (マスターバイク)	Master Cycle	Master Cycle
Wakuwaku Beetle (わくわくビートル)	Streetle	Streetle
Kisekae Scooter (きせかえスクーター)	City Tripper	City Tripper
Bowser Trike (バウザートライク)	Bone Rattler	Bone Rattler

The Japanese version also calls this part a frame rather than a body.

Tires

Japanese	European	American
Normal Tire (ノーマルタイヤ)	Normal	Standard
Wild Tire (ワイルドタイヤ)	Monster	Monster
Roller Tire (ローラータイヤ)	Roller	Roller
Ring Tire (リングタイヤ)	Slim	Slim
Slick Tire (スリックタイヤ)	Slick	Slick
Metal Tire (メタルタイヤ)	Metal	Metal
Button Tire (ボタンタイヤ)	Button	Button
Block Tire (ブロックタイヤ)	Off-Road	Off-Road
Sponge Tire (スポンジタイヤ)	Sponge	Sponge
Wood Ring (ウッドリング)	Wooden	Wood
Cushion Tire (クッションタイヤ)	Cushion	Cushion
Normal Blue (ノーマルブルー)	Normal Blue	Blue Standard
Wild Hot (ワイルドホット)	Funky Monster	Hot Monster
Sky Roller (スカイローラー)	Azure Roller	Azure Roller
Spicy Ring (スパイシーリング)	Crimson Slim	Crimson Slim
Cream Block (クリームブロック)	Retro Off-Road	Retro Off-Road
Gold Tire (ゴールドタイヤ)	Gold Wheels	Gold Tires
GLA Tire (ＧＬＡタイヤ)	GLA Wheels	GLA Tires
Triforce Tire (トライフォースタイヤ)	Triforce Tyres	Triforce Tires
Leaf Tire (リーフタイヤ)	Leaf Tyres	Leaf Tires

The European version also calls this part a wheel rather than a tire (or tyre, as it would happen).

Gliders

Japanese	English
Super Kite (スーパーカイト)	Super Glider
Billowing Balloon (もくもくバルーン)	Cloud Glider
Wario Kite (ワリオカイト)	Wario Wing
Zunguri Kite (ズングリカイト)	Waddle Wing
Flower Kite (フラワーカイト)	Flower Glider
Koopa Kite (クッパカイト)	Bowser Kite
Sailplane (セイルプレーン)	Plane Glider
Parafoil MKTV (パラフォイルＭＫＴＶ)	MKTV Parafoil
Gold Kite (ゴールドカイト)	Gold Glider
Hyrule Kite (ハイラルカイト)	Hylian Kite
Paper Airplane (かみひこうき)	Paper Glider

Other

There are also some regional differences in other parts of the game, like the menu text or chat macros, such as removing slang to make a translation into different languages easier.

Text	European	American
200cc mode description	Super fast - braking is crucial!	CRAZY FAST! Braking is crucial.
Chat macro	So unfair!	Not fair!
Chat macro	I'm using motion controls!	I'm using tilt controls!
Chat macro	I'm heading off...	I'm outta here.
Chat macro	Thanks very much!	Thank you!
Chat macro	Good night!	Goodnight!

Version Differences

Version 2.0

The Version 2.0 update was released on August 27, 2014, and boasted the following features:

• Adds an in-game shop menu on the main start screen to purchase and download downloadable content.
• Adds a statistics menu accessible from the main start page, giving players access to the number of coins they’ve collected, win-loss record play, favorite courses, and characters, number of boosts and super boosts, etc.
• Adds the ability to display a course minimap on the TV screen by pressing the minus ("-") button on the Wii U GamePad.
• Changes the default menu option after a race to whichever option was selected after the previous race (either “Next Race” or “Watch Highlight Reel”).
• Saves each player's most recent vehicle customization to system memory, restoring it even after the Wii U is powered down and rebooted.
• Increases the maximum player race or battle rating from 9,999 to 99,999.
• Improves stability for online races and battles, as well as a number of other fixes for overall player enjoyment.

(Source: My Nintendo News)

This update also changed how rating points were distributed through online matches: the required placement to gain ranking points was raised significantly for players with a large rating advantage, possibly to arrest VR and BR inflation. (This change was effectively reversed in Version 3.0.)

As of 2.0, the "random" option in online matches no longer has a chance of selecting one of the three tracks up for election (except for Battle mode, where this is still possible).

Version 3.0

The Version 3.0 update was released on November 13, 2014. This patch was required for online play.

• Adds DLC characters Tanooki Mario, Cat Peach, and Link and courses from the Egg and Triforce Cups to the online rotation, if DLC Pack 1 has been purchased. An option is provided to play online mode with downloadable courses or without, although no such feature is provided for downloadable characters.
• Preemptively implements amiibo functionality and adds the appropriate icon to the main menu (the first wave of amiibo would not be released until November 21). This feature allows players to unlock themed racing suits for Mii characters by placing a compatible figure on the Game Pad's NFC area. The Mii icon in the character select was updated to indicate this.
• Fixes balance issues and implements a number of other fixes for overall player enjoyment.

(Source: Nintendo Support)

This change reverted the online rating system to follow rules similar to Version 1.0, making it easier for high-rated players to gain points.

Version 4.0

The version 4.0 update was released on April 23, 2015.

• Adds DLC characters Villager, Isabelle, and Dry Bowser, and courses from the Crossing and Bell Cups to the online rotation if DLC Pack 2 has been purchased.
• Adds 200cc as a selectable class.
• Adds new amiibo-unlocked outfits for the Bowser, Sonic, Villager, Mega Man, Rosalina, and Toad amiibo, and preemptively adds outfits for the Olimar, Wario, and Pac-Man amiibo, which would be released later.
• More Miiverse stamps are included.

(Source: My Nintendo News)

Version 4.1

The version 4.1 update was released on May 1, 2015, and automatically unlocks the Mirror and 200cc classes if they weren't unlocked already, among other minor fixes.

Totaka's Song

A short signature tune of Kazumi Totaka's, this tune is hidden in almost every game in which he has composed music for. Some tracks in the game feature Yoshis that cheer for the racers, and there is a chance one of them will be singing the song (as Totaka is also the voice of Yoshi). But to make it even harder to listen to, it is low in volume and easily drowned out by the background music, the Yoshis' animations and sounds are set randomly every race, and the player cannot hear it in MKTV replays. Players must actually be racing the course.

Track	Where it can be heard (locations are set randomly)
Sweet Sweet Canyon	One of the Yoshis at the starting area, or at the house just after the tracks merge.
GBA Mario Circuit	One of the Yoshis near the pitstop.
SNES Donut Plains 3	One of the Yoshis standing on blocks.
N64 Yoshi Valley	One of the cheering Yoshis along the fence at the start of the track.
GCN Yoshi Circuit (DLC Pack 1)	One of the Yoshis at the start or in the tunnel.
GCN Baby Park (DLC Pack 2)	One of the cheering Yoshis along the edge or center of the track.
Super Bell Subway (DLC Pack 2)	One of the cheering Yoshis around the starting area.

To do: With all the locations found in the retail game and DLC Pack 1, there'll definitely be areas of interest in checking for DLC Pack 2, Animal Crossing track (K.K. Slider might be singing it), as well as the possibility that Villager and Isabelle may sing the song if sitting idle for long enough.

Oddities

Revision Files

Beyond the base game, there are two files going by resourcerev.dat and srcrev.dat, these appear to be copied over accidentally from the stripped debug directory of the final game, they appear to contain the revision of the game data and source files.

srcrev.dat	resourcerev.dat
129722	129724

Since these are revision numbers and not unique hashes for a specific commit, it is likely that Nintendo was using Apache Subversion as their version control for Mario Kart 8.

DLC Placeholders

In DLC directories, excluding 13, 15, 17 and 19, there are some text files with no data at all, possibly to help the developers note what DLC would go here if any were added.

course_dummy.txt

course dummy file.

course_permission.txt

course permission file.

dl_permission.txt

have a permission.

dl_reservation.txt

have a reservation.

Character Audio Filename Oddities

The audio for most of the characters is mainly comprised of recordings from earlier games. Characters such as Mario, Luigi, and Wario have cleaner recordings of their Mario Kart 64 voices, but mainly for boosting and tricks. Tanooki Mario, on the other hand, has recordings coming from a slew of Mario games, such as Super Mario Advance and Sunshine to name a few. The developers even included the source game in the name of each sound file where applicable: "Kart64" for Mario Kart 64, for example.

Internal Project Name

The game's executable is referred to as Turbo.rpx. Like Super Mario 3D World, it has files throughout the game's data that also refer to the project name.

(Source: ItsEasyActually, Catley)