Ben 10: Omniverse (Xbox 360)

In Ben 10: Omniverse, players can play as both Young and Teen Ben, switch forms between 13 playable alien heroes, including new aliens like Bloxx and Gravattack, and fight in an assortment of action-packed levels throughout the subterranean alien city of Undertown and other show-inspired locales. In Ben: 10 Omniverse, Rook will also star in the game come equipped with a Proto-Tool, a swiss army knife of the future, that can transform into a variety of weapons that will bring a whole new dimension to combat.

https://www.youtube.com/watch?v=gFOrR8QlGPQ