What is the real walk through walls code for Pokemon ruby?

It depends on the version of the Action replay , CodeBreaker , Gameshark ,Ect.

Version 1 Action Replay

E03b0649

5d67050c

78da95df

44018cb4

Version 2 Action Replay

CE2CCCB2

5D8D815D

Warning!!! It's a Type 6 code. It allows you to walk over any obstacle like trees, houses, rocks, and to walk on water. With this code, you'll still be able to interact with the game (enter doors, talk to people, take items, etc...). The two things you can't do are :

-walk directly from ground to water (and water to ground). To do this, you need either to use the SURF move, or to walk from ground to water from an unauthorized place (like walk on a tree and from there walk on the water, or if you are on the water, walk on a rock and from there walk on the ground).

-Go out of the map limit. Each map (each route, room, etc...) is a rectangle of tiles. With this code, you'll be able to move anywhere within that rectangle, but you won't be able to cross its limit (unless you enter another map). That means, for example, if you enter a house, you won't be able to walk in the "dark". But anyway, there is nothing in that dark :)