Cheat mode:
Press Up, Right, Down, Left, Up, Left, Down, Right at the difficulty selection screen to display the cheat options.

View ending credits:
Press Down(4), Up (4) at the difficulty selection screen.

Super jumps:
Press Down(2), Up during game play.

Moves:

Jet boots: Press Back, Back, Forward, A.
Defense Cape: Hold Select and press B.
Saw Blade: Press Back, Down, Forward, A.
Sonic Pulse Globe: Press Back, Down, Forward, B.
Force Wall: Press Forward, Down, A
Electric Pellet: Press Down, Forward, A.
Bat Bola: Press Back, Forward, B or A
Bat Cuffs: Back, Forward, A.
X-ray vision: Press Back, Back, Forward, B.