This American version of the game was slightly modified - 'maze-like' stages were inserted here and there. Actually, these stages exist in the Japanese version but without the 'find the right doorway' concept. This makes some of the areas a lot more difficult than they initially were as most of the passageways lead the player back to the beginning of the stage. All the character names were also changed.
TIPS AND TRICKS
Unlock the Japanese version: The Japanese version of the game can be unlocked from the American version. At the title sequence, when the Jaleco logo appears, press B, A, X and Y. A chime should sound to indicate that the Japanese version was unlocked. At the option screen, the Japanese title will appear in the background and a menu should now allow you to select the Japanese game.