Pokémon Crystal Version is a role-playing video game developed by Game Freak and published by Nintendo for the Game Boy Color. It is the third version of second generation games after Pokémon Gold and Silver, and it is also the final Pokémon game to be released for the Game Boy Color system. It was released in Japan in 2000, and then internationally in 2001.

Pokémon Crystal was released worldwide on the Nintendo 3DS Virtual Console on January 26, 2018.

The gameplay of Pokémon Crystal is largely the same as in Gold and Silver, although it has several new features. It is the first Pokémon game to allow players to choose the sex of their character, while previously the character was always male. For the first time, Pokémon have brief animated sprites once entering battle; for example, when a Cyndaquil enters battle, the flames on its back flicker. This feature was absent in Pokémon Ruby and Sapphire and Pokémon FireRed and LeafGreen, before reappearing in Pokémon Emerald and all subsequent games. In addition, a couple of subplots were added, one involving the legendary Pokémon Suicune, featured on the front cover of the game, and the other involving the Unown. The game's most significant addition is the Battle Tower, a new building which allows players to participate in Pokémon Stadium-like fights. The Japanese edition of the game was exclusively bundled with the Mobile Adapter GB,[b] a device that allowed for connecting with other players via a mobile phone.