Activision will co-publish the new game inspired by the popular UK-made kids online game Moshi Monsters.
Moshi Monsters: Moshlings Zoo is released for the Nintendo DS in November.
Activision was announced as a 'partner' for the project during a keynote speech at the Develop conference by Michael Acton Smith, CEO of Moshi creator Mind Candy.
Mind Candy has closely controlled the DS game's project - Acton revealed the game's existence to Develop last year, and updated us with more details on the title in a June cover story on the game and its CEO.
UK developer Black Lantern is producing the game.