Robot Wars - Extreme Destruction

Additional money:
Go to the competition mode menu, then push the following buttons:
L, R, L, R, Y, X, Up, Left, Up, R, L, R.

Unlock House Robots in the arcade mode garage:
Go to the competition mode menu, then push the following buttons:
R, L, Up, Up, Up, L, R, Down, Down, Down, X.

Enable invisibile mode:
Pause the game play, then push the following buttons:
R, L, Right, Left, Right, Left, Right, Left, Y, X, X, X, X, R, L.
Reenter the code to disable the cheat effect.

Transparent armor:
Pause the game play, then push the following buttons:
R, L, R, Y, Y, Y, Left, Right, Left, Down, Y.

Toggle AI:
Pause the game play, then push the following buttons:
R, L, X, Y, X, Y, Up, Down, Up, Down, R, L, R.

Unlock all arenas:
Go to the main menu, then push the following buttons:
R, L, Down, Down, Down, L, R, Up, Up, Up, Y

Infinite time:
Pause the game play, then push the following buttons:
R, L, Up, Up, Up, L, R, X, X, X, Y.

Unlock Hypno-Disc and Razer:
Finish level 6 in competition mode and beat the champion

Unlock Tornado, Dominator 2 and Chaos 2:
Finish level 7 in competition mode and beat the champion