Secret artwork:
Set the internal date of the Saturn to one of the following values and load the game: January 1, February 14, March 3, May 5, and December 25. Artwork specific for those dates will appear in the options screen. Once viewed, they may be selected again on any date.

Play as Carbunkle:
Highlight Arle (the main girl character) and hold Start until the Carbunkle appears.

Play as Satan:
Highlight Shin (the character to right of Arle) and hold Start until the Satan appears.

All characters are elephants:
Highlight the elephant and hold Start.

Reversed character select:
Highlight Draco (the training character) and hold Start. Player one will be able to choose player two's character and vice versa.

Random character select:
Highlight Lulu (the last character on the lower right) and hold Start.