The Gameplay Of Super Mario 3ds is similar to that of Super Mario 64.You must collect Stars and Grand Stars And find Secrets, but there are many new Features: you can play as Luigi, Wario, and Waluigi. You travel all over the Mushroom World trying to defeat the Antagonist, who is Wart (from SMB2), not Bowser.
Characters (playable): Wario, Mario, Luigi, Waluigi.
Items: Ice Flower, Fire Flower, Metal Mushroom (not cap), Red Star, Cloud Flower, Boo Mushroom, Yoshi/Birdo.
World 1: Mushroom Kingdom
World 1 Boss: Whomp King
World 2: Isle Delfino
World 2 Boss: Bowser Jr.
World 3: Bowser's Lava Land
World 3 Boss: Bowser
World 4: Sarasaland
World 4 Boss: Tatanga
World 5: Wario Land
World 5 Boss: Capitan Syrup
World 6: Dry Dry Desert
World 6 Boss: King Boo
World 7: Dino Island
World 7 Boss: Dark Yoshi
World 8: Subcon
World 8 Boss: Wart
World 9(bonus) : Retro Land
World 9 Boss: N/A