On which platform were Pokémon Red and Green first released?

Pokémon Red and Green were first released on the Game Boy.

Game Freak developed the games for Nintendo’s monochrome handheld, using its cartridge format and Link Cable to support communication between players. Trading and battling through the cable became central to Pokémon’s identity and helped distinguish it from many other role-playing games.

The original Japanese versions were Pocket Monsters Red and Green. International releases used Pokémon Red and Blue, because the Japanese Blue version supplied updated artwork and programming for the overseas editions. Pokémon Yellow later offered a modified experience inspired partly by the anime.

The Game Boy’s technical limitations shaped the original presentation: battles used simple sprites, the game world was tile-based, and the soundtrack relied on the system’s basic audio hardware. Despite those constraints, the platform supported a large creature-collecting adventure and helped Pokémon become one of Nintendo’s defining handheld series.