Players must use a GameShark or Action Replay code to walk through walls because this feature was never intended to be part of the game. For this reason, using a code to walk through walls may cause the game to freeze, crash or trap the player.
Both cheats require that a "master code" first be active before entering the code that enables walking through walls. All other cheats may also need to be disabled for the code to function.
For the GameShark, the master code is 000014D1 000A10044EC8 0007. The code to walk through walls is 509197D3 542975F4 78DA95DF 44018CB4.
For the Action Replay, the master code is 72BC6DFB E9CA5465 A47FB2DC 1AF3CA86. The code to walk through walls is 509197D3 542975F4 78DA95DF 44018CB4.