This video shows off all the Castles and Koopalings in New Super Mario Bros. U for the Wii U. Subscribe to NintendoCentral: ► https://www.youtube.com/c/NintendoCentral New Super Mario Bros. U Playlist: https://www.youtube.com/playlist?list=PLJY2r98E0ngIAUcLvvUGb9FoSlEpZRwqk