Remember Rave Master, the manga Hiro Mashima was working on before Fairy Tail? Mobage made a new game with Haru, Elle, and Plue. Rave Master Ultimate Battle has various characters represented as cards and SD avatars when you’re in battle.
Rave Master Ultimate Battle has a guild system wher eyou can join up with other players to trade items and request help when you’re in a Demon Card battle. Mobage released Rave Master Ultimate Battle for iOS and Android devices.