From Glitch City Laboratories
The Silph Co. PC Glitch is a miscellaneous glitch in Pokémon Red, Pokémon Blue and Pokémon Yellow which causes the player to enter a Glitch City-like realm where it is difficult to move around, when possible.
- Cause the Hall of Fame to become glitched by viewing the stats of another Glitch Pokémon such as 'M.
- Check the Hall of Fame, exit, and Log Out.
The surrounding area will now become a mass of glitchy tiles.