Password screen chanting:
Press Left at the Gamespeak screen to chant. Then, enter the password screen and rapidly tap Up, Down, Left, or Right.

Super jump:
Jump and pause game play while in mid-air. Resume game play and press B to jump again while still in the air. Repeat this to move as high as needed. Note: Moving too far up can crash the game.

Bypass intermissions:
Press Start to advance past the intermission sequences.

Sound test:
Pause game play and press various buttons to hear sounds from the game.