The retail version typically includes the "Ray" expansion, featuring a new playable character with a health-drain mechanic and an additional gameplay stage. Wii U Version Performance & Technical Issues

Mighty No. 9 for the Wii U (European Loadiine version) is a 2D side-scrolling action-platformer that follows Beck, a robot immune to a virus that has turned other "Mighty Number" machines against humanity. Gameplay Features

The Wii U version is widely noted for having significant technical drawbacks compared to other platforms.