In Super Smash Bros. for Wii U, you can play Classic Mode with two players, and battle the Master-type opponents cooperatively. Director Masahiro Sakurai posted a screenshot of this feature, featuring the Master Beast boss on Miiverse.
Sakurai added: “The Wii U version-exclusive Master Fortress is only available in single-player mode. You’ll need to attack its heartlike cores.”
Super Smash Bros. for Wii U will be available November 21st in North America and November 28th in Europe.