Spin-off Pokémon games

Spin-off Pokémon games are games that do not fit the model used by the core 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 core series games to certain spin-off games in order to get a reward, normally a special Pokémon.

In Japan and South Korea, the names of the spin-off games use Pokémon (Japanese: ポケモン, Korean: 포켓몬) instead of Pocket Monsters (Japanese: ポケットモンスター, Korean: 포켓몬스터).

List of spin-off games

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 series

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.)

TCG 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)

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)

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)

Mystery Dungeon series

Main article: Pokémon Mystery Dungeon series

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)

Rumble series

Main article: Pokémon Rumble series

Trozei series

Pokémon Trozei! (DS puzzle game; players have to line up four Pokémon in a row in order for them to disappear)
Pokémon Battle Trozei (3DS sequel to Pokémon Trozei!)

Puck series

Pokémon Battrio (arcade game)
Pokémon Tretta (sequel to Battrio)
Pokémon Tretta Lab (3DS application for use with Tretta)

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)
Super Smash Bros. for Nintendo 3DS/Wii U (Sequel. Pikachu, Lucario, and Charizard will return as playable characters, and Greninja is a newcomer to the series, and Mewtwo returning as DLC. Charizard is a standalone character, rather than linked to Squirtle and Ivysaur with the Pokémon Trainer.)

Other

Picross NP Vol. 1 (SNES game, similar to the unreleased Pokémon Picross. It included 12 Pokémon-themed puzzles, such as Togepi)
Pokémon Play It!, and its remake version Pokémon Play It! Version 2. Both are games for the PC that simulate the Pokémon Trading Card Game.
Pokémon Snap (N64 first-person rail shooter; player takes pictures of Pokémon on Pokémon Island)
Pokémon Picross (GBC game; player paints by numbers. It was announced in various game magazines in 1999, but was never released)
Pokémon Dash (DS racing game; players play as Pikachu attempting to outrun Pokémon)
Learn with Pokémon: Typing Adventure (DS educational game that is played with an attaching keyboard)
PokéPark: Fishing Rally DS (DS Download Play demo)
Pokémon Conquest (DS tactical RPG crossover between the Pokémon and Nobunaga's Ambition series of games)
Pokédex 3D (3DS Pokédex for Generation V)
Pokédex 3D Pro (3DS National Pokédex for Generation V)
Pokémon Art Academy (3DS art game crossover between Pokémon and Art Academy series)
The Thieves and the 1000 Pokémon (3DS free downloadable, movie tie-in game; players collect Pokémon to fight thieves)
Pokémon Shuffle (3DS puzzle game)
Great Detective Pikachu ~Birth of a New Duo~ (3DS cinematic adventure)
Pokémon Picross (3DS free dowloadable game)
Pokémon GO (mobile application)