Super Mario 3D World follows the titular plumber, his brother Luigi, Princess Peach, and Toad as they travel to the Sprixie Kingdom to save the Sprixie Princesses from the clutches of Bowser. Like every other main Mario series game, 3D World takes players through various worlds and levels, battling enemies and bosses with unique power-ups as they work to defeat Bowser. That's not all. Players are treated to four bonus levels after they take Bowser down.
Source：https://www.cbr.com/super-mario-3d-world-how-many-worlds/
