Super Mario 3D World is a platform video game published by Nintendo for Wii U in 2013. It follows Mario and his friends on their quest to save the Sprixies and their Kingdom from Bowser’s invasion by passing through individual levels. This installment introduces Super Bell, a power-up which turns the character into a cat allowing them to climb walls and use a scratch attack. The video game also introduces Rosalina, an unlockable fifth character.