This article details various glitch meta-map scripts in Cerulean City's Pokémon Gym in Pokémon Red and Blue.The script is controlled by memory address D5FD.
Highlights
Done at entrance:0x04: May cause walking lag and corruption of a tile block west of the entrance and out of bounds. 0x08: May cause arbitrary code execution at region F03E in Echo RAM (a copy of C03E in RAM). 0x0D: Start menu may open and then continue to open each time it is closed, but it is still possible to walk around while it is closed. 0x0E: Brings up a 'blackboard' text menu describing status ailments. This text is normally not intended for Cerulean City Gym. 0x10: Game may reset (not a Glitch Dimension). No known side effects. 0x11: May cause arbitrary code execution at region D301 in RAM, which is in the middle of Pokédex flags (Own 81-88) and nearby the player's inventory at D31D. 0x14: May flash the screen white, before resetting the game (not a Glitch Dimension). No known side effects.
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