PokéGods City

A common rumored location to find PokéGods is a city that cannot be accessed regularly. This city has been called Pokémon Island, Cloud City, the PokéGod Factory, Brick Town and PokéGod Island. The only theme throughout all of these is that PokéGods can be obtained easily in them.

Hall of Fame
Most codes describe defeating the Elite Four a certain number of times, usually thirty. Professor Oak would then say something along the lines of "I'm getting tired of this" before leading you to the city. It is often thought to be located behind the Hall of Fame. Some codes say that you cannot talk to anyone between the nurse at the Indigo Plateau Pokémon Center and your Rival.