Dexter's Laboratory: Deesaster Strikes! Codes -

Invincibility:
Pause game play, then press L(3), R(5), L, R(4), L(3).

Level skip:
Pause game play, then press L(3), R(2), L, R(3), L, R, L, R(3), L.

Extra life:
Pause game play, then press L(2), R(2), L, R, L(3), R, L(2), R(2), L(2). Repeat to get more lives for a maximum of nine.

Extra ray gun ammunition:
Pause game play, then press L, R(3), L(2), R(2), L(4), R, L(2), R.

Faster movement:
Pause game play, then press L, R(4), L, R, L, R(2), L(2), R, L, R(2).

Less damage:
Pause game play, then press L, R(4), L(3), R, L(6), R.

Higher jumps:
Pause game play, then press L(2), R(6), L(2), R(2), L(3), R.

Faster opponents:
Pause game play, then press L, R(5), L(4), R(4), L(2).

Slower opponents:
Pause game play, then press L(2), R(3), L, R(3), L(2), R(2), L(2), R.

Stronger opponents:
Pause game play, then press L(2), R(4), L, R(3), L(6).

Stronger Dexter:
Pause game play, then press L(2), R(3), L(2), R, L(2), R(2), L, R, L, R. Dexter can destroy robots easier by punching or kicking for a limited amount of time.

Reverse controls:
Pause game play, then press L, R(6), L, R, L(2), R(2), L(3).