Pokémon Stadium (Japanese, title: ポケモンスタジアム２ Pokémon Stadium 2, subtitled as Pocket Monsters' Stadium 2) is a Nintendo 64 game that allows players to upload and battle their Pokémon from the first generation Pokémon games, Pokémon Red, Blue, Yellow, and Green in Japan. It features several battle arenas, introducing Stadium Mode's original four cups, the Pika Cup, Petit Cup, Poké Cup, and Prime Cup, the latter two of which would return in the sequel, and the original Gym Leader Castle. It also features new Pokémon cries, a feature that was carried on in the sequel for Pokémon from Generation II.

It was originally released in Japan on April 30, 1999, in North America on February 29, 2000, in Australia on March 23, 2000, and in Europe on April 7, 2000. It was announced during the September 13, 2022 Nintendo Direct that the game would be rereleased as part of the Nintendo Switch Online + Expansion Pack in 2023. However, this version of the game will be unable to connect to the original Game Boy or Virtual Console games.

This game is the sequel to the mostly incomplete original, which was never released anywhere outside Japan.