Things You'll Need
Instructions
Load your copy of "Animal Crossing: Wild World" into your Action Replay device. Load the device into your Nintendo DS, then turn on the console and allow it to load to the Action Replay screen.
Tap the "Codes" button to see a list of games associated with your Action Replay. Tap "Add New Game" if you do not have "Animal Crossing: Wild World" already in your system.
Input "Animal Crossing: Wild World" as the name of the game using the virtual keyboard. Press "Start" to proceed to the next step. You will be asked to input the Game ID, but this is already filled in for you by the Action Replay. Press "Start" to save your settings.
Tap "Animal Crossing: Wild World" now that it appears on your list of games. Tap the "Add New Code" button. With the virtual keyboard, name the code "Master Code," then press "Start."
Input "00000000 023f0000 00000000 00000001 00000000 00000000 00000000 00000000 00000000 00000000 00000000 023ffe88 00000000 023ff090 00000000 00000000 00000000 00000001" with the virtual keyboard. Press "Start" to save the code.
Tap the "Add New Code" option again. This time, name the code "Walk Through Anything" or something else that correlates to the code's effect. Press "Start" to get to the code input screen.
Input "B21C7374 00000000 94000130 FFBE0000 D9000000 FFFFFAC0 D4000000 FFFFFF30 D6000000 FFFFFAC0 D0000000 00000000 94000130 FF7E0000 D9000000 FFFFFAC0 D4000000 000000D0 D6000000 FFFFFAC0 D0000000 00000000 94000130 FFDE0000 D9000000 FFFFFAB8 D4000000 FFFFFF30 D6000000 FFFFFAB8 D0000000 00000000 94000130 FFEE0000 D9000000 FFFFFAB8 D4000000 000000D0 D6000000 FFFFFAB8 D2000000 00000000" with the virtual keyboard. Press "Start" to save the code.
Launch the game via the Action Replay main menu. During gameplay, hold down "A" while you're walking, to pass through walls and other solid objects.