Mendel Palace

Mendel Palace is a game about pushing tiles and knocking bad guys into walls. It also happens to be the first game Game Freak ever made. Perhaps you've heard of them?

A Super Famicom remake was planned, but never released.

Debugging Features#

Debug Menu#

Enter the Game Genie code ZAKLSGAA (Mendel Palace) or ZASLEGAA (Quinty), then hold B and press Start at the title screen to activate the debug menu.

The options are as follows:

• DEATH/NO DEATH - Turns invincibility on or off.
• NUMBER OF PLAYER - Number of lives to start the game with.
• SCENE NUMBER - Select a level to play. The first number determines whether the "EXTRA" levels are active (0=no, 1=yes), and can be changed by pressing Select.

Moving the cursor up past DEATH/NO DEATH allows you to change the current tileset, character sprite, and character palette.

Warp to Final Level#

Enter the Game Genie code AKNUOGAA, then hold Left and press Start at the title screen menu to warp to the final castle.

Unknown#

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: Is this all the code does?

Enter the Game Genie code EAEUUIAA, then hold Right and press Start at the title screen menu. This marks the fortress at the center-right of the map as cleared.

In-Game Debugging Features#

Enter the Game Genie codes AUKXYXXT LESZAXXT, then hold B and press A at the title screen menu to enable a few in-game debugging features.

At any time during the game:

• Reset - Press Start + Select to reset the game.

While the game is paused:

• Frame advance - Press Start to advance one frame. Press Select to unpause.
• Swap layers + 98 Stars - Hold Down and press Select to swap the playfield layers and set the Star counter to 98.

Crash Dump#

In the Japanese version, if a BRK opcode is executed as the result of a program crash, the game will write a number of CPU registers and RAM variables to the screen before going into an infinite loop. The numbers displayed are as follows:

• Line 1 - Stack pointer, accumulator, X register, Y register, processor status register.
• Lines 2-13 - Contents of the stack.
• Lines 14-15 - Scratchpad RAM ($00-$09).

Regional Differences#

Title Screen#

Japan	US

The title screen was completely changed for the US release, displaying art of the game's enemy characters.

Tile Graphics#

Japan	US

The tile that gives the player five extra seconds on the timer was changed, possibly to make its purpose more clear. The kanji in the center of the US tile, 伍 (go), appropriately means "five".

Japan	US

In the House of Vinci, the artist enemies will draw different pictures than normal if the timer starts running low. On Round 6, the picture is a nude woman's torso (since their normal drawing is a woman's face) in the Japanese version. This was replaced with a drawing of a Japanese "sailor fuku" school uniform in the US version.

Revisional Differences#

Namco Museum Archives#

The game was re-released as part of Namcot Collection / Namco Museum Archives Vol. 2 title in 2020.

Original (Japan)	Namcot Collection
Original (US)	Namco Museum Archives Vol. 2

All other companies' names save Game Freak have been removed from the copyright text.

Nintendo Classics#

The game was re-released as a Nintendo Classics title in 2026.

NES (US)	Nintendo Classics

The Hudson Soft text was removed from the title screen.