It wouldn't be a Wii game without motion control, and New Super Mario Bros. introduces some light tilting and waggling to spice things up.
E3: New Super Mario Bros. 2 has full co-op support – Destructoid
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New Super Mario Bros. Wii, Ultimate Pop Culture Wiki
New Super Mario Bros. Wii Review - IGN
Kirby and the Rainbow Curse Review Roundup - GameSpot
Nintendo confirms that New Super Mario Bros. U is 1080p – Destructoid
New Super Mario Bros. U, Nintendo
Review: Super Mario Bros. Wonder, Destructoid
As promised, New Super Mario Bros. Wii box is fancy – Destructoid
E3 09: Hands-on with New Super Mario Bros. Wii – Destructoid
Choke to death on these New Super Mario Bros. Wii screens – Destructoid
Super Mario 3D World - Wikipedia
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Review: New Super Mario Bros. Wii – Destructoid
Gamer beats NSMBU level without touching the ground – Destructoid