Brock through walls: Difference between revisions

'''Brock Through Walls''' ('''path manipulation walk through walls''') is a [[walk through walls]] glitch in {{RGBY}}. It is popular in speedrunningspeedruns of Pokémon Red and Blue. It is possible to perform this glitch very early in the games (except in {{Y}}, as the Youngster cannot be skipped in this version).

The "walkWalk through walls" [[GameShark]] codecodes hashave always been fun and useful to people., Contrary to popular belief,but a similar effect is now possible without the use of a [[game-altering device]] via a glitch. It is possible to perform the "Brock Through Walls" glitch very early in the games (except in {{Y}} because the Youngster cannot be skipped in this version).

There are many ways to set up this glitch, but the glitchit is ultimately triggered by talking to the Pewter City Youngster from the right instead of the left, which was not intended to be possible.

As it shouldn't be possible to talk to the Youngster from the right, theThe developers never programmed aan alternate path for the player to follow when the player is to the right of the Youngster. When talking to him, the game looks for the player's coordinates but often never finds them, usually resulting in a softlock.

However, the player can manipulate somecertain values in the RAM to spell out the player's coordinates, (0x10, 0x24). The coordinates need to appear at address xxx2, xxx6, xxxA, or xxxE to "align" with the lookup table. When this happens, the game will use the next two bytes as a path pointer. (Otherwise, the aforementioned softlock occurs.)

Certain paths may overwrite the memory address $CD38, which allows the player to override the scripted movement by holding down a button, and walk through walls in whatever path he ir she chooses, similar to what happens inwhen using the glitch [[museum guy method|walk through walls trick (museum guy method)]].

The player can also skip Pewter Gym through another means such as a wrong warp by manipulating item 36's quantity (exit destination) in the [[expanded items pack]]. It is not easy to get an expanded items pack before defeating Brock, but it is possible,. forSome examplepossible bymethods would include:

A third possibility is to first defeat Brock, and later use another glitch to corruptset the "defeated Brock" event flag back to 0.

* It must know exactly three moves. Additionally:

Another setup may be faster, especially if the starter happenhappens to have the required 16 Special:

This setup will putwrite "10 24 00 0F" atto $D196 ~ $D199.

The game never seemseems to intentionally set $CD38 to any nonzero value, but its effect is to allow certain joypad inputs to override scripted movement. And itIt is very generous: As long as the player is holding down any of the specified buttons, the entire joypad input is accepted. For example, if the B button is able to override, then the player can simple hold down the B button to be able to walk in any direction or to stay put.