Spin-off Pokémon games

From Bulbapedia, the community-driven Pokémon encyclopedia.

Spin-off Pokémon games are games that do not fit the model used by the main series and are not developed by Game Freak. These games vary widely in genre, and cover many different consoles and handheld game systems. Sometimes, it is possible to connect the main series games to certain spin-off games in order to get a reward, normally a special Pokémon.

Pokémon Card GB series

Pokémon Trading Card Game (Game Boy strategy game; players use Pokémon Trading Cards to battle instead of actual Pokémon)
Pokémon Card GB2: Here Comes Team GR! (Game Boy strategy, similar to the first game, but including Generation II Pokémon as well. Only released in Japan)

Pokémon Pinball series

Pokémon Pinball (Game Boy pinball game; players can battle and capture various Generation I Pokémon)
Pokémon Pinball: Ruby & Sapphire (GBA pinball, similar to the first game, but includes Hoenn-native Pokémon only)

Pokémon Puzzle series

Pokémon Puzzle League (N64 puzzle game, similar to Tetris Attack, and based on the anime. Only released in North America, Australia and Europe)
Pokémon Puzzle Challenge (GBC puzzle game, also similar to Tetris Attack)

Hey You, Pikachu! series

Hey You, Pikachu! (N64 virtual pet; player owns and explores various locations with a Pikachu, talking to it with a microphone)
Pokémon Channel (GameCube virtual pet; player watch TV with their Pikachu, and uses the GameCube's clock to unlock new programs)
PokéPark Wii: Pikachu's Adventure (A Wii game; player takes the form of a Pikachu and competes in many minigames while befriending a variety of Pokémon)
PokéPark 2: Wonders Beyond (A Wii game; player takes the form of a Pikachu and helps to restore peace to a land with the help of friends. A sequel to the aforementioned title.)

Pokémon Mystery Dungeon series

Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team (GBA/DS dungeon crawler; players control a human who has turned into a Pokémon)
Pokémon Mystery Dungeon: Explorers of Time and Explorers of Darkness (DS dungeon crawler, similar to the previous games, with the addition of Generation IV Pokémon)
Pokémon Mystery Dungeon: Explorers of Sky (A third version of Explorers of Time and Darkness)
Pokémon Mystery Dungeon: Keep Going! Blazing Adventure Squad!, Let's Go! Stormy Adventure Squad!, and Go For It! Light Adventure Squad! (WiiWare Mystery Dungeon titles that focus on Water, Electric, and Fire-type Pokémon)

Pokémon Ranger series

Pokémon Ranger (DS action RPG; player is a Pokémon Ranger and visits a new region, Fiore)
Pokémon Ranger: Shadows of Almia (DS action RPG that follows the same formula as its predecessor, but includes Generation IV Pokémon and travels to a new region, Almia)
Pokémon Ranger: Guardian Signs (DS action RPG; sequel to Pokémon Ranger: Shadows of Almia, using the same capture style as Shadows of Almia, once again following the same formula as the previous two games, and travels to a new region, Oblivia)

Pokémon Rumble series

Pokémon Rumble (WiiWare action game; players control Toy Pokémon and battle other Pokémon in numerous stages)
Pokémon Rumble Blast (3DS sequel to Pokémon Rumble)

Super Smash Bros. series

Super Smash Bros. (N64 fighting game that pits various Nintendo characters against each other. Pikachu and Jigglypuff are playable, while various Pokémon appear out of Poké Balls to aid in combat)
Super Smash Bros. Melee (GameCube sequel to Super Smash Bros., where Pichu and Mewtwo are added as playable characters. As with the previous game, a variety of Pokémon appear as helpers to the fighters, as well as Trophies)
Super Smash Bros. Brawl (Wii sequel that sees the addition of Lucario and a Pokémon Trainer as added characters while Pichu and Mewtwo do not return. As in the previous two games, a variety of Pokémon appear as extra help and trophies)

Other Pokémon games

Pokémon Picross (GB/GBC game; player paints by numbers. It was announced in various game magazines in 1999, but was never released)
Picross NP Vol.1 (SNES game, similar to the unreleased Pokémon Picross. It included 12 Pokémon-themed puzzles, such as Togepi)
Pokémon Snap (N64 first-person rail shooter; player takes pictures of Pokémon on Pokémon Island)
Pokémon Dash (DS racing game; players play as Pikachu attempting to outrun Pokémon)
Pokémon Trozei! (DS puzzle game; players have to line up four Pokémon in a row in order for them to disappear)
Battle & Get! Pokémon Typing DS (DS educational game that is played with an attaching keyboard.)
Pokémon + Nobunaga's Ambition (crossover between the Pokémon and Nobunaga's Ambition series of games)