Wolfenstein 3D Cheats (GameBoy Advance)

Press Start to pause gameplay, then hold L + R and press A, A, B, the A five times. A
sound will confirm correct code entry.

Press Start to pause gameplay, then hold L + R and press A, B, A, A, B, B, B, A. The sound
of a door opening will confirm correct code entry. When the game is resumed, you will
start on the next level. Note: If this code is enabled on level 1, you will go to the
secret floor.

Press Start and hold L + R, press A once, B twice, then press A five times.  If done
correctly, B.J. will say "Yeahh!"

Press Start to pause gameplay, then hold L + R and press A, B, A, A, B, B, A, A. The sound
of a siren will confirm correct code entry. When the game is resumed, you will start on
level 9.