Koei Tecmo

Koei Tecmo is a company that was formed from the merger of Koei and Tecmo and is a game developer most commonly known for Dynasty Warriors, Nobunaga's Ambition and other such strategy and action games across various devices.

Their interactions with Pokémon initially came with a desire for a Dynasty Warriors game but eventually it turned into a crossover between Pokémon and their Nobunaga's Ambition franchise

Koei Tecmo has developed 2 Pokémon Games in total.