Mario & Luigi: Bowser's Inside Story

Mario & Luigi: Bowser's Inside Story is the third title in the Mario & Luigi series, now with 99.98% more vore!

Unused Items
There's an unused item in the game, a white mushroom with red hearts on it, named "DUMMY". It restores 60 HP for Bowser when used. If used while Mario and Luigi are fighting an enemy that Bowser inhaled with the Vacuum Block, they will throw it in the air and it will explode, restoring Bowser's HP with its effervescent vapors.

Code (US version): 22056419 00000063

Unused Enemy Behaviors
Certain enemies in the game are only meant to be fought with either Mario and Luigi or Bowser, and the other(s) will never encounter it in normal gameplay. However, if hacking is used to encounter the enemies with the other character(s), you can see that their behaviors change:


 * Naplock - Its sleeping snot-bubble is avoided just by standing there, but you can be damaged by it if you jump while it's above you. Its block-drop attack is dodgeable with jump; You can break the bricks with their head. This is very easy to do, just by mashing the button. Not exactly unused, the dodge was probably just set to jump as a default because Mario and Luigi don't normally encounter it.
 * Dark Mechawful - Its punching attack is countered by hammering. Its countdown attack is replaced by one that spawns the stars that the Head uses when attacking Mario & Luigi on it's own, which slowly move toward you and they only hurt you sometimes. Its counter is jump. This could just be the game being very confused though, rather than something unfinished, possibly the game trying to use the Heads star attack with the body attached.
 * Choomba - Makes "M" and "L" smoke signals instead of Bowser's fist and shell and it freezes next turn after charging up.
 * Dark Trashure - All of the things it throws can be countered with a jump just like with the regular Trashure, but they are very fast-moving, In fact, it seems that the more damage the object will do, the faster it moves. Not surprisingly, it still throws mushrooms.
 * Nooz and Fawflants - They're small, so Bowser can stomp them in the overworld and collect 10 coins without fighting them.

Water Fountain


Seems to be an early version of the Princess Peach fountain in Toad Town. Interestingly enough, it depicts her as a mermaid.

Sound File References
The music data references all of the tracks from Mario & Luigi: Partners in Time, though they were all either replaced with copies of the news flash or tutorial themes or used to hold the new music. Because of this, a number of the new tracks are duplicated, including the title theme and various battle themes.

Debug Menu
Like its predecessor, this game has a debug menu. Select a number, and Mario and Luigi will be sent to some places and cutscenes in the game. The Japanese version has description text, unlike the US version, which replaces them all with "no need to translate".

Action Replay code (hold B while selecting a place inside Bowser's body):

Lower-Left Block

 * 0 - Shake animation
 * 1 - "Mario lands in Bowser's Insides" cutscene in the first room of the Trash Pit. Mario only, you cannot switch to Bowser when activated. Luigi is trapped a few rooms below.
 * 2 - Brings you right to Luigi in the Trash Pit.
 * 3 - The elevator room in the Trash Pit.
 * 4 - The room where you get your first Green Shell Attack Part.
 * 5 - The room with the last Green Shell Attack Part.
 * 6 - The first hammer battle room.
 * 7-10 - Bowser Room Select Screen. However, you're trapped in one room and cannot move around to other rooms.
 * 11 - A room in the Pump Works.
 * 12-16, 21, 29-34, 37-59, 61-69, and 71 - Bowser Room Selection Screen corresponding to a certain point in the game, with smaller numbers corresponding to earlier points in the game (with certain areas inaccessible) and larger numbers corresponding to later points in the game (with most or all areas accessible).
 * 17 and 19-20 - Bottom screen fades to black, music restarts and game freezes.
 * 18 - Shows Fawful Theater on the bottom screen.
 * 22 - The Flab Zone room right after the Alpha Kretin boss room.
 * 23 - Cutscene with Starlow wondering why Fawful needs Peach and Peach explaining that Fawful may be looking for the Dark Star, then the bottom screen returns to the Bowser Room Selection Screen (but dark as if Bowser is being controlled), the top screen fades to black, and the game freezes.
 * 24 - Cutscene with Peach being taken out of Bowser's body and Bowser being blasted out of the castle. After Bowser falls into the Underground Tunnel, the top screen cuts to the first room in the Underground, but with the camera off-center and Bowser in the top-left corner. Bowser is stuck in his walking-northward animation, but can be moved around. However, you are stuck in this room. If the X button is pressed, Bowser becomes stuck in his northward Slide Punch animation and can no longer be moved. If the Y button is pressed, the same thing happens with Bowser's northward fire-breathing animation.
 * 25 - Similar to 24, but without the part with Mario, Luigi, Starlow, and Peach inside Bowser's body, instead starting with the part where Fawful takes Peach and carries her away. Also, part of the background during the cutscene is missing up until Bowser accidentally lights the Bob-omb's fuse.
 * 26 - Pipe Yard.
 * 27 - Shows Mario and Luigi warping back into Bowser's body from the Toad Town pipe. Then, the game suddenly acts as if you're chasing Durmite, with Starlow reminding you to go after it. After that, nothing else, except that areas of Bowser's body unlocked after the Energy Hold are blocked off.
 * 28 - Cutscene with chasing Durmite into the Energy Hold and being stopped by the Boo Block barrier.
 * 35 - Joint Tower.
 * 36 - Bottom screen fades to black and freezes.
 * 60 - Chest Station minigame. Freezes almost immediately.
 * 70 - Takes you to Bowser Castle, right in front of the cryo-chamber puzzle room. Once you're inside the room, you're stuck inside.
 * 72-99 - Shake effect.

Upper-Left Block

 * 0 - Intro cutscene. Game might freeze when loading this.
 * 1 - Peach's Castle, where you're greeted by a Toad. Attempting to enter the next room will cause the screens to fade to black and freeze.
 * 2 - Shows the background used for the first Giant Bowser Battle, on which you can freely move around. However, Mario and Luigi are not seen.
 * 3 - The cutscene which happens after Bowser eats the Vacuum Shroom.
 * 4-12, 14-16, 18-24, 29-30, 43-44, 46, 48, 50, and 54-55 - Bowser Room Selection Screen.
 * 13 - Nerve Cluster, in the room where Toadbert was trapped.
 * 17 - Same as 13.
 * 25 - Toad Town Tunnels, in the room where Bowser was zapped, off the map in the top-left corner.
 * 26 - Toad Town Tunnels, in the room right before the Dark Star's chamber.
 * 27 - Entering Toad Town from the yellow pipe.
 * 28 - Dr. Toadley's Clinic, off the map in the top-left corner.
 * 31 - Dr. Toadley's Clinic, specifically, Dr. Toadley's room. Attempting to exit the building freezes the game.
 * 32 - The reception room in Dr. Toadley's Clinic, where you must rescue Birdley.
 * 33 - Plack Beach, at the beginning of the path to Chakron.
 * 34 - The room in Dimble Wood where Wiggler blocks your path until you get 6 Attack Pieces.
 * 35 - Same as 34.
 * 36 - The room where Luigi becomes trapped in the Sockop, but you are off of the map (and off-screen) and cannot move.
 * 37 - Dimble Wood as Sockop Luigi, in the room Mario was taken to. However, you cannot talk to the Sockops to save Mario.
 * 38 - Chakron (off-screen) asks if you wish to be launched to Toad Town. Once you return to Toad Town, attempting to exit the area freezes the game.
 * 39 - Dr. Toadley's Clinic, before you use the Miracle Cure on the blockade.
 * 40 - The path to Peach's Castle.
 * 41 - Top-leftmost area in Peach's Castle Garden, with the water spout.
 * 42 - Area right after 41, where you previously fought Junker.
 * 45 - Area shown in the cutscene before the final Dark Bowser battle, with Mario, Luigi, and Starlow. A copy of Luigi's sprite can be seen in the top-left corner. You cannot actually move Mario and Luigi, but if the A button is pressed, the jump sound effect can be heard.
 * 47 - The animation of Bowser Castle shaking, seen before the first Giant Bowser Battle.
 * 49 - Plack Beach, the area with Kuzzle's house.
 * 51 - Plack Beach, Kuzzle's house.
 * 52 - Peach's Castle Garden, at the entrance.
 * 53 - The cutscene that occurs after the Blorbs are cured, but Mario and Luigi can move freely around the area.
 * 55-56 - Screen fades to black and freezes.
 * 57-98 - Shake effect.
 * 99 - The area in Dimble Wood with the pipe back into Bowser's body...but you can walk over everything, the pipe's color is blue instead of green, and the pad you step on to enter the pipe is yellow. A copy of the pad is north of the pipe. It also plays the incorrect music. Most likely used as a test area.

Upper-Right Block

 * 0 - Pump Works gate room.
 * 1 - Flame Pipe room.
 * 2 - Screen fades to black. Everything still functions, but you can't see anything on the bottom screen until you switch to Bowser.
 * 3 - The Nerve Cluster room where you fight Durmite for the first time.
 * 4 - The Nerve Cluster room where Toadbert was originally trapped.
 * 5 - The second Flab Zone room.
 * 6 - The first Nutsoglobin room in the Flab Zone.
 * 7 - The third room in Flab Zone after the "Treasure of E'erlasting Wonder" room.
 * 8 - The room in the Flab Zone where you learn the Spin Bros. ability.
 * 9 - Same as 8, but in a different spot.
 * 10 - The Alpha Kretin boss room.
 * 11 - Same as 10, but in a different spot.
 * 12 - The first Flab Zone room.
 * 13 - The third Flab Zone Room.
 * 14 - The second room in the Energy Hold.
 * 15 - The fourth room in the Energy Hold.
 * 16 - The Star Block room in the Energy Hold.
 * 17 - Same as 16.
 * 18 - The first room in the bottom-left section connected to the Star Block room, in the Energy Hold.
 * 19 - The room right after 18.
 * 20 - The first room in the top-right area connected to the Star Block room, in the Energy Hold.
 * 21 - The room in the Energy Hold where you learn the Drill Bros. ability.
 * 22 - The room right before the boss room in the Energy Hold.
 * 23 - The boss room in the Energy Hold, near the entrance.
 * 24 - The same room, near the exit to Bowser's body.
 * 25 - The room right after 20.
 * 26 - The cutscene that happens after you defeat Wisdurm.
 * 27-28 - Lumbar Nook.
 * 29-35 - Toad Square with the camera weirdly off-center.
 * 36 - Bowser Room Selection Screen.
 * 37 - Memory Banks.
 * 38 - Mario and Luigi enter the Airway and stop. The game then becomes unresponsive. Perhaps it is trying to load the Airway cutscene, but cannot because the room does not freeze over.
 * 40 - Third room in the Airway.
 * 41 - Fourth room in the Airway.
 * 42 - Fifth room in the Airway.
 * 43 - Sixth room in the Airway. Are you noticing a pattern yet?
 * 44 - Eighth room in the Airway. Poor seventh room gets no love.
 * 45 - Eleventh room in the Airway.
 * 46 - Gut Check. How this got in the middle, I'll never know.
 * 47 - Thirteenth room in the Airway, near the Liftglobin.
 * 48 - Same room, up above.
 * 49 - Fourteenth room in the Airway, near where the Totemglobin was.
 * 50 - Fifteenth room in the Airway.
 * 51 - Sixteenth room in the Airway, near the exit to the next room. The devs must have spent a lot of time working on the Airway...
 * 52 - Twentieth and second-to-last room in the Airway.
 * 53 - Twenty-first and final room of the Airway, beginning with the same "negative" effect seen before the Dark Star battle.
 * 54 - Hub that connects the fourth, eleventh, and thirteenth rooms in the Airway.
 * 55-56 - Bowser Room Selection Screen.
 * 57 - Same as 29-35.
 * 58 - Room in the Energy Hold where that really long cutscene with the Bros. trying to catch Durmite took place.
 * 59-60 - Same as 29-35 and 57.
 * 61 - Room in the Pump Works where the Mini Mario ability is learned.
 * 62-63 - Challenge Node.
 * 64 - Second room in the bottom-right area connected to the Star Block room in the Energy Hold.
 * 65-66 - Same as 62-63.
 * 67-99 - Shake effect.

Lower Right Block

 * 0 - Bowser Room Selection Screen.
 * 1 - First Arm Center minigame (most likely freezes partway through).
 * 2 - Gut Check Giga-Carrot Minigame (acting as if you failed the first time, with a big pile of carrots instead of the Giga-Carrot). Also allows rematch with Wiggler, but the game freezes after the battle.
 * 3 - Rump Command Minigame, freezes as soon as the minigame starts.
 * 4 - Nose Deck minigame, has second selection of numbers from 0-4 corresponding with each time the minigame was played during the story. Freezes midway through the minigame.
 * 5 - Leg Outpost minigame, never ends.
 * 6 - Chest Station minigame, game hangs as soon as it starts.
 * 7 - Second selection of numbers from 0-19 chooses where a "reaction" occurs, including Toad Square and the Challenge Node. 0 simply sends you back to the Bowser Room Selection Screen.
 * 8-9 - Shake effect.
 * 10 - Second selection from 0-10 corresponds to each part of the game, and therefore blocks access to some of the areas in Bowser's body. 0 is the start of the game with only the Trash Pit, Funny Bone, Toad Square, and Challenge Node, and 10 is the end of the game where all areas are accessible.
 * 11 - Related to 10, prevents access to everything except Trash Pit, Arm Center, Funny Bone, Toad Square, and Challenge Node.
 * 12 - Gut Check Giga-Carrot minigame (with Giga-Carrot and tutorial). Also allows rematch with Wiggler, but the game freezes after the battle.
 * 13 - Rump Command minigame, freezes as soon as the minigame starts.
 * 14 - Nose Deck minigame, freezes midway through the minigame.
 * 15 - Leg Outpost minigame, never ends.
 * 16 - Chest Station minigame, freezes as soon as it starts.
 * 17-20 - Shake effect.
 * 21 - Second selection of numbers 2 and 3 chooses either the second or third Arm Center minigames, most likely freezes partway through.
 * 22 - Shake effect.
 * 23 - Second selection of numbers from 0-3 chooses which time the Rump Command minigame is played in the story. The minigame freezes as soon as it starts.
 * 24-29 - Shake effect.
 * 30 - Same as 7.
 * 31 - Same as 21.
 * 32 - Shake effect.
 * 33 - Same as 23.
 * 34-40 - Shake effect.
 * 41 - Same as 21.
 * 42-98 - Shake effect.
 * 99 - Save screen. Might have been used by developers during debug process.

Extended Debug Room
If further hacking is used to move away from the blocks, the "Debug Room" is found to be much larger than expected, with the debug functions to the far left of the room. The upper platforms are not solid, but the lower platforms are. The floor of the room also seems to have a special texture not seen anywhere else.

Regional Differences
The Japanese version supports the Rumble Pak, which was strangely removed in all other versions. The previous game in the series supported it in all versions.