Disabled Debug Features
The Game Genie code AANNNNNY re-enables simple debugging features. During the game, you can press Start to skip the current level. Pressing A before starting a new game makes you invincible and pressing B will take you directly to the ending.
The Japanese version is based on the anime Moeru! Oniisan. The game features levels in a different order, completely different sprite changes, and some levels have you playing with different characters. Also, the final boss (named Dra Gon) is played in an RPG-style combat system. The music was also completely redone to fit the NES version, however, the Bonus Game songs, boss songs, and game over songs, as well as various jingles were kept the same.
Addiontally, a staff roll was present in the Japanese release and was omitted from the American release.