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Monster Party

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Title Screen

Monster Party

Developer: Human Entertainment
Publisher: Bandai
Platform: NES
Released in US: June 1989

CodeIcon.png This game has unused code.
GraphicsIcon.png This game has unused graphics.
ItemsIcon.png This game has unused items.
LevelSelectIcon.png This game has a hidden level select.

ProtoIcon.png This game has a prototype article
PrereleaseIcon.png This game has a prerelease article
NotesIcon.png This game has a notes page

Monster Party is...well. It's one of those games that really doesn't lend itself well to description, but in one word, it's weird.

The Japanese version (that went unreleased) contains a wide variety of zany bosses that are blatantly based off of famous movie characters. Because of legality reasons, the bosses were modified for the American release resulting in an even more absurd game than the original.


Read about prototype versions of this game that have been released or dumped.
Prototype Info
Read about prerelease information and/or media for this game.
Prerelease Info
Miscellaneous tidbits that are interesting enough to point out here.

Deleted Graphics

For two bosses in level one, the localizers simply blacked out the background graphics in the CHR when removing the copyrighted references. All that remains in the US ROM are the tile and collision data.

Round 1 Room 1

To do:
Get a better image illustrating that the data still remains.
US Prototype
Yep, now I can hear you. Monster Party (Proto)-Plant Boss.png

The localizers edited the speaker and microphone graphics to remove the Little Shop of Horrors reference. Because the localizers never touched the collision data, Mark seems to float in midair where the speaker was removed.

Round 1 Room 4

US Prototype
Guess he got mugged of code. Monster Party (Proto)-Ape Boss.png

Tile data for the Statue of Liberty still remains after the Planet of the Apes boss was changed to a happy Pumpkin-Ghost boss.

Unused Controller Code

A cheat from the Japanese prototype is disabled for the final US release; however, code for checking button input for it is still present. See the notes page for details.

In the prototype, it greatly increases the time Mark spends in Monster Mode during his first transformation. To trigger it, hold Up + Down + Left + Right + A + B on Controllers 1 and 2, the easiest way being to hold Up + Left + A + B on the former and Down + Right on the latter.

Hidden Passwords

The game accepts 8 passwords in the following format, where # is a digit from 0 to 7 (periods are blanks/skulls):


These passwords will start you on the numbered stage + 1 (so 055 0 would start you on Stage 1, etc.).

Unused Graphics

Monster party race car.gif
A little wolf guy in a race car, found among the Round 1 enemy graphics.

Monster Party Unused1.PNG
An unused frame for one of the enemies in Round 1.

Monster Party Unused2.PNG
It appears the crocodiles in Round 4 were going to be able to launch their tails at you like the ones in Round 2.

Monster Party Unused3.PNG
Some sort of wardrobe, likely meant to accompany the other possessed furniture in Round 6.

This musical note is stored with the graphics for the Round 1 plant boss and is used as projectiles for the boss in the Japanese prototype.

Monster party notes.png
These notes are stored with the punk rocker boss of Round 4. In the final game, he only shoots eighth notes at you.

Monster Party Unused Boss.PNG
What appears to be an unused boss. This is stored in the tileset used by the boss rooms in Rounds 4 and 6.

To do:
Try to identify all of these.

Monsterparty-9.png Monsterparty-4.png Monsterparty-7.png Monsterparty-3.png
A series of unused powerups, made to resemble those from popular arcade games of the time. Unused code reveals that the game once utilized an incremental, item-based powerup system (similar to that of arcade shooters like Raiden) for Bert's shots, as opposed to the stage-based powerup system used in the final version.

Monsterparty-5.png Monsterparty-6.png
A cheeky monkey and bone projectile, stored with the other Round 1 boss sprites. These were likely intended to appear during the battle with the Planet of the Apes-inspired boss seen in the Japanese prototype.

It's...a key. While you do receive keys after defeating certain bosses, you never actually see them as collectible items and the key graphic in the status bar looks very different than this sprite.


A bunch of totem pole faces for a scrapped boss that's only present in the Japanese prototype.