Mendel Palace

Codes

Activate 2-Player Mode

At the stage select screen during the single-player game mode, press Select + Start on Controller 2 to enable the two-player game mode.

Extra Levels

Hold Select + Start, then Reset NES (during game)

Game Genie Codes

SLSIXXVS        Infinite lives

AAVZLPZA        1 life

IAVZLPZA        5 lives 

AAVZLPZE        9 lives

KEXLXKSE        Player 1 has more lives

KEXLSKSE        Player 2 has more lives

IEXIAIPA        Pick up more stars

SZUIOOSU        Player 1 gains player 2's speed-ups
VTUSEOVN