Pokemon Gold and Silver are identical games, however, the noticeable difference between the two is the Legendary Pokemon that can be captured. In Gold is the bird Pokemon Ho-Oh, while in Silver is the flying Pokemon Lugia.

Pokemon Gold and Silver, the first main series sequels, were released in late 1999. These versions don't differ quite as much between Japanese and everywhere else: only a slight variation in version exclusives exist. The games featured far superior graphics and were Game Boy Colour compatible, and had a unique set of sprites between games.

After the massive success of Pokémon Red/Blue/Yellow came new games Pokémon Gold and Pokémon Silver. They were released for Game Boy Color but were backwards-compatible with the original Game Boy. 100 new Pokémon were available along with several new features like breeding and Pokémon friendship.