Kizuna Encounter

Taking place one year after the events of the first game, Sho Hayate had won the tournament while defeating both King Leo and his fake impersonator King Lion. To seek revenge against Hayate and those who had caused his humiliating downfall, King Leo has organized a second version of the Battle of the Beast God tournament, but this time there's a new rule: teams of two people must work together so that they can either ensure victory or face defeat. (wiki)