Pokémon Rumble, known in Japan as Melee! Pokémon Scramble, is a spin-off Pokémon WiiWare game. It was developed by Ambrella and was released on June 16, 2009 in Japan, on November 16, 2009 in North America and on November 20, 2009 in Europe for 1500 Nintendo Points. It was announced on the June 5th, 2009. A free demo version was released in North America on the same day of the release of the full game version.
Pokémon Rumble is a real-time action-RPG in which players control, collect and battle clockwork Pokémon toys in an epic quest to - you guessed it - become the ultimate Pokémon master. The player directly controls their chosen Pokémon using the Wiimote held sideways, battling dozens of Pokémon simultaneously in real time. The single-player component starts the player off with a lowly Pokémon which must venture forth into the wild in order to train against wild Pokémon (including some menacing boss fights), capture new Pokémon and earn currency which can be used to upgrade your roster. Once your Pokémon are strong enough they can be entered in the Battle Royal which pits twelve trainers against each other in a frantic last-man-standing bout. The fun doesn't stop there, either - up to four players can take on the Battle Royal together via local multiplayer in both competitive and co-operative modes.