From the Super Mario Wiki, the Mario encyclopedia
Meowser Showdown! is the final course in Super Mario Maker 2's Story Mode. It is unlocked when the Chief gets kidnapped. The course is set in a castle theme, and has a difficulty rating of 3/4 stars. Once the course is cleared, the Chief will return and the castle will be complete, and the player will also unlock the Super Hammer.
To start, there is a ! Block Mario must Ground Pound to reach two ? Blocks, one of which contains a Super Mushroom. There are a few more ! Blocks along the way which stretch out over small pits of lava with Fire Bros between them. At the end of this section is a Heavy Fire Bro and a Banzai Bill cannon in the background. There are then two more ? Blocks and a ! Block above a lava pit containing a Magmaargh. After a Bully is another ! Block above a long pit of lava. Here, there are two Banzai Bill cannons in the background. The next area has a few ! Blocks Mario must Ground Pound to build up. He must then head right to a face-off with Meowser. Mario can slip past him and a few enemies to a Clear Pipe which in turn takes him to the red Pipe leading to the next section.
The next section itself is a Koopa Troopa Car section with steadily rising lava. There is a variety of enemies along the way as well as a few bonus Coins Mario can pick up with some careful maneuvering. He also has to change direction often. At the end is a Warp Box taking him to the very start of the next section. Here, Mario must hop out of the car and head into a Clear Pipe taking him to a Checkpoint Flag. To the right is Meowser. Mario must make his way up this vertical section, activating ! Blocks, collecting coins, and dodging enemies as needed. At the top is a final boss setup in which Mario must use the Red POW Blocks fired from the Bill Blasters on both sides. He can also climb the Trees to find Super Bells. After Meowser is defeated, Mario can use the Key to open a locked Warp Box which takes him to a free 50-Coin and a red pipe.
The red pipe takes Mario to the final area. There is a simply a blue Track Block Mario must ride up to the Goal Pole, where he will find Toadette imprisoned in a cage on the other side. Lowering the flag also opens the cage, dropping Toadette and leaving them both to celebrate.
"THIS. IS. TERRIBLE! The Chief has been abducted by Bowser! We'll never be able to complete the castle without her! Please help us, Mario!"
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