The new Wii U game, being developed by the same studio that developed Super Mario Galaxy and its sequel for the Wii, will allow for four-player co-op in a 3D Mario world.

Mario, Toad, Luigi, and Princess Peach were shown, with Nintendo emphasising differences between the characters: Toad is slightly faster than everyone else, for instance.

A new power-up was also shown: Cat Mario, which allowed Mario to climb walls and scratch enemies.

Super Mario 3D World will be released for Wii U in December, Nintendo says.