There are some cool Wii U exclusive features, including:
-There are some combos listed on the GamePad screen that you can use by tapping them, only problem about this is that you can get distracted by them because they are somewhat unresponsive, and you can lose great amounts of helth trying to use one combo on the GamePad, so some users may prefer using the Wii U Pro Controller or Wii Classic Controller.
-There is a new mode called Mushroom Battle, where you and a friend battle it out while there are mushrooms from various Mario games, which are the Mega Mushroom, Poison Mushroom (which makes you smaller) and the Mushroom itself, whichincreses size but not as much as the Mega Mushroom.
-You can dress characters as Nintendo characters, such as Mario, Luigi, Captain Falcon, Zelda, Sheik, Link, Toad, Peach, Bowser, and more.
-You can graffiti on characters' costumes using the Wii U GamePad.
The graphics are great, replay value is pretty good, multiplayer is the heart and soul of this game, and it is a blast. This is the perfect game if you have some friends or a brother.