View character attributes:
Highlight a character and press L1 at the character selection screen. The number of circles will indicate how well your character is ranked in that particular attribute (Stamina, Speed, Power and Psyco Power). Note: Press L1 + L2 in the Japanese version of the game.

Screen adjust:
Hold X + Triangle + Circle + Square at the title screen. Keep holding those buttons and press the D-pad to adjust the screen on the grid that appears.

Suicide bomb:
Rapidly tap X, Circle to fill the glove power bar until it explodes.

Bonus characters:
Successfully complete the Junior Cup and save the game to access six bonus characters in the next game in exhibition mode.