Which company created the Pokémon video-game series with Satoshi Tajiri?

Game Freak created the Pokémon video-game series with Satoshi Tajiri.

Satoshi Tajiri founded Game Freak and originated the concept that became Pokémon. The studio developed Pocket Monsters Red and Green for Nintendo's Game Boy, while Nintendo published the games and helped bring them to market.

Ken Sugimori, an early Game Freak collaborator, provided the franchise's principal character design and art direction. This is a common point of confusion: Tajiri is associated with the original concept and creation, while Sugimori is associated with the visual design of the Pokémon world.

Game Freak continued to develop the main role-playing games across Nintendo hardware. Other companies contributed to spin-offs, mobile titles, animation, cards, and merchandise, but Game Freak remains the studio most directly associated with the core video-game series.