Pokémon Mystery Dungeon
Outside of the main series, Squirtle appears in "Hey You, Pikachu!", "Pokémon Snap", "Pokémon Pinball", "Pokémon Stadium", "Pokémon Channel", "Pokémon Trozei!", ', "Pokémon Ranger", ', "Pokémon Mystery Dungeon: Explorers of Sky", ', "Pokémon Rumble", ', "Pokémon Rumble Blast", ', "Pokémon Rumble U", "Pokémon Battle Trozei", "Pokémon Shuffle", "Pokémon Rumble World", "Pokémon Super Mystery Dungeon", "Pokémon Picross", "Pokémon Rumble Rush", ', "Pokémon Café Mix", "Pokémon Masters EX", "Pokémon Go", "Pokkén Tournament", "New Pokémon Snap", and "Pokémon UNITE". In "Super Smash Bros. Brawl", Squirtle is now playable character under the command of the Pokémon Trainer, alongside with Ivysaur and Charizard which must be switched between in order to avoid fatiguing the Pokémon. Squirtle returns as a playable character in "Super Smash Bros. Ultimate" for Nintendo Switch, once again linked with Ivysaur and Charizard, although the removal of the fatigue mechanic means that an entire match can be played effectively using Squirtle alone.