New Super Mario Bros. Wii is a side-scrolling 2.5D Mario platformer for the Wii and the tenth game in the Super Mario series. In addition to the single-player experience New Super Mario Bros. Wii also features a multiplayer mode for up to four players. This is the first Super Mario game to feature co-op and vs. modes at the same time since Mario Bros. It features more items new levels and more enemies than the DS predecessor. The game introduces two new power-ups the Propeller Mushroom and the Penguin Suit which turn characters into their propeller and penguin forms respectively.