From Bulbapedia, the community-driven Pokémon encyclopedia.
Spike Chunsoft (Japanese: スパイク・チュンソフト Spike Chunsoft), formerly Chunsoft (Japanese: チュンソフト Chunsoft), is a Japanese video game developer specializing in console RPGs. It was founded by Koichi Nakamura, a video game designer from Enix. They are the developers of the Pokémon Mystery Dungeon series.
In April 1, 2012, Chunsoft was merged with Spike, and the company name is now Spike Chunsoft. It is currently owned by Dwango.
Notable non-Pokémon games
They have also developed for other series such as Dragon Quest and Sound Novels. It also made the highly critically acclaimed Nintendo DS game 999: Nine Hours, Nine Persons, Nine Doors. Its name is taken from Chun, a character that appeared in Enix's very first video game, Door Door.