This glitch only works in the Generation I of Pokémon games. The "Glitch Region" cheat can be performed if the player has done the walk through walls Safari Zone cheat. The player must fly to the Pokémon League and go down until the front entrance is reached. Rather than going into the front gate and walking by the guard, the player will walk over the building, causing every town that player walks to, to be glitched. This glitch will end if the player flies, teleports, or gets into a battle.There are no known negative effects.