Pokémon League descent glitch maps 0xED-0xEE, 0xF1-0xF4 (Yellow)
The 'Glitch Pokemon League Rooms' are a somewhat eccentric group of maps which share the same header occupying hexadecimal identifiers ED to F4.
The map data for these glitch locations are exactly the same but are exclusive to Pokemon Yellow and therefore cannot be accessed on Pokemon Green through the Doko-Kashira Door Glitch. The events which happen in these locations are pure glitch; it is notable that the player's sprite will be replaced; usually with a silhouette of the player or a female character and the player will be forced to spin in the direction he entered from.
It is possible that these glitch locations have been used to store data which did not exist on Pokemon Red, Blue and Green and therefore run odd events. For example the default music for any of these glitch locations is the Cycling Theme. One cannot just open the start menu and check on the town map as the player is made to keep spinning. When the music for the Cycling Theme is about to loop the game will freeze.
If the town map is used in this area (through the use of a code) the game will state that the player is in the Pokemon League for all its hexadecimal identifiers. The actual appearences of these locations are quite unusual; as unlike Glitch City it does not use a mixture of real tiles, instead it uses glitched ones.
Procedure (Pokemon Yellow)
1. Enter the GameShark code 01XX5DD3 for when XX is between ED and F4; when the game boots up keep the switch off. 2. Enter a door and turn the switch on; you will appear in this glitch area and will be spinning in the direction you came from.