I do not think there is one, and all the codes for it have been made already. Codes are basically for all the items, pokeballs, medicene, ETC. None for walking through walls or for all pokemon have been made yet, last time I checked the CodeJunkies.com for approved cheats.
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do what is the walkthrough walls action replay code for Pokemon heartgold.
Unfortunatly, there is no cheat at this time (or action replay code) that lets you keep the outfit in either SoulSilver or HeartGold.
There is a cheat on Action Replay, and i know because i have action replay.
You have to have action replay.
You can not unless you use third party modifiers like an Action Replay.you can get it if you have a pokewalker and translate a pokemon into it and when its saving you turn the game off and there you have two pokemon