This article is a summary page for different variations of a glitches, etc. when talked about as a whole.
Town Map name: (Blank) Identifier (HEX) FF Identifier (DEC) 255 Default track Unknown Tileset Unknown Size Unknown Map type Special map handler, Freeze glitch map
Map 0xFF is a game mechanic in Pokémon Red, Blue, Yellow. Some indoor location exits use map 0xFF to redirect the player to the location stored in the memory address $D365 ($D364 in Yellow). In the Safari Zone exit glitch this is abused to redirect the player to a map's warp $04 even if the coordinates and block data for that map is invalid, resulting in a Glitch City for many locations.