Pokémon Rumble U is the tale of the Toy Pokémon’s great adventure: after a mishap in the Toy Pokémon Shop, a few Pokémon capsules are swept down a river and washed up on a strange riverbank. Our heroes set out to find their way back to the Toy Pokémon Shop. Along the way they discover all is not right: can you help them discover why some of the Toy Pokémon are fighting each other, and what the enemy Pokémon are plotting?