Toggle AI:
Pause the game during gameplay and press R, L, X, Y, X, Y, Up, Down, Up, Down, R, L, R
Unlock All Arenas:
Go to the main menu and press R, L, Down, Down, Down, L, R, Up, Up, Up, Y
Get House Robots:
Go to the competition mode menu and press R, L, Up, Up, Up, L, R, Down, Down, Down, X
More Cash:
Go to the competition mode menu and press L, R, L, R, Y, X, Up, Left, Up, R, L, R
More Time:
Pause the game during gameplay and press R, L, Up, Up, Up, L, R, X, X, X, Y
Toggle Invisibility:
Pause the game during gameplay and press R, L, Right, Left, Right, Left, Right, Left, Y, X, X, X, X, R, L
Toggle See Through Armor:
Pause the game during gameplay and press R, L, R, Y, Y, Y, Left, Right, Left, Down, Y