Pokémon Rumble is an action RPG Pokémon game published on WiiWare. Gone is the turn-based gameplay seen in the main games. Instead you control a toy Pokémon and battle against a bunch of other Pokémon in real-time combat. The toy Pokémon are models taken from My Pokémon Ranch.
Starting off with a lower leveled Pokémon with one attack you gain experience (coins) that can be used to purchase new stronger and varied creatures. The coins come from defeating wild Pokémon. Over time as you get stronger Pokémon and reach the end of a stage you face off against a powerful boss Pokémon. Defeating these Pokémon is the key to advancing into the final part of each rank which is a Battle Royale against a bunch of Pokémon.
Up to 4 friends can play together or against one another in a Battle Royale. If you want you can even save some of your toy Poémon to your Wiimote and bring it to a friends Wii and transfer it there.