Marvelous announced that their jet racing mobile game, Dolphin Wave, will hold a Shin Ikkitousen collaboration starting December 19. The collaboration will include a story event, “The Inheritor of the Magatama! A Warrior and a Dolphin Encounter,” and two UR dolphins, Kan’u and Shiryu.

Check out the collaboration trailer below:

Dolphin Wave is available in Japan for Android, iOS, and PC (via DMM Games). Check out the first 10 episodes of the story below: