Pokémon cloning, Balls that don’t work, Kanto cities cut for lack of space, the developers’ secret office: Gold, Silver and Crystal hide more mysteries than their cartridge lets on. Here are the most famous ones, from bugs exploited by players to the little secrets left by Game Freak.

Some of these bugs are harmless, others can damage a save file: they are presented here to help understand the game, not to be reproduced lightly. Always keep a backup copy of your game (on the Virtual Console, thanks to restore points) before any experiment.

We go over the best-known programming bugs, the traces of the cartridge’s lack of space, the developers’ winks and the rumors that set playgrounds on fire.