Turbo mode
Hold (Z) and press (B), (A), (L)x2 at the title screen. The game speed can now be set over 50 in marathon mode. Alternately, earn over 10,000 points in the Time Zone.

Secret characters
Hold (Z) on controller one and simultaneously press (L) + (R) on controllers one and two at the two player trainer selection screen. Alternately, successfully complete Spa Service.

Taunts
Select any two player game mode. Have player one select a character, then repeatedly press (A).

Master code
Hold (Z) and press (A), (B), (R), (A)x2, (B), (R), (A) at the title screen. All selections in the Puzzle University will be unlocked.

V-Hard difficulty setting
Hold (Z) and press (L)x2, (A), and (B) at the difficulty selection screen. Alternately, successfully complete the game under the Hard difficulty setting.

S-Hard difficulty setting
Hold (Z) and press (R), (L), (A), (B) at the difficulty selection screen. Alternately, successfully complete the game under the V-Hard difficulty setting.

Mewtwo level
Hold (Z) and press (B), [Up], (L), (B), (A), (Start), (A), [Up], (R) at the trainer selection screen. Alternately, successfully complete the game under the S-Hard difficulty setting.