The Great Tower of Bowser Land
From the Super Mario Wiki
The Great Tower of Bowser Land (known as The Great Tower of Bowser World in the British English version), also known as World Bowser-Castle is the final standard course of World Bowser, and the final main course in Super Mario 3D World. It is set in Bowser's Castle, now amusement-park themed, with a very tall tower on the center. Unlocking this level requires 170 Green Stars.
The course begins near the remains of the Koopa Chase Lv2, with a zipline right next to it; scratching the golden tire wheel while wearing a Cat Suit will cause the car to light up and make a foghorn noise. After jumping onto the zipline, it leads onto a rooftop that contains bottomless pits, volcanic debris from the volcano in the background, and Spikes in the floor. Upon reaching the Crazy Clown Ferris Wheel, Captain Toad greets the player(s) as he stands next to another zipline.
Once the player(s) reach the large tower in the center, Bowser appears and uses a Super Bell to turn himself into Meowser. The rest of the course involves climbing the tower while Meowser attacks them repeatedly; he shoots fireballs, climbs up walls and slides down them, and often breaks through them with his scratches. Eventually, he uses Double Cherries so his doubles can assist him. At the end of the course, the giant Super POW Block must be hit four times to finally defeat Meowser.
During the credits, Mario, Luigi, Peach, and Toad return to the Mushroom Kingdom, as do Captain Toad and the other Toads. Bowser is left trapped inside a bottle, while Boom Boom is upset and Pom Pom tries to comfort him. The Sprixie Princesses, their people and Plessie also give their new friends a fond farewell. Additionally, Rosalina appears if the player replays the level after unlocking her.
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