Bowser Castle

Walkthrough: Before going through the gates into Bowser's Castle, jump up the left of more rooftops to find more Purple Coins, as well as another archway. Explore the right side to find another Spark Pylon to bring you to another Power Moon, and then inside the newly opened gates. Cross the inner courtyard to find two more Pokios and a pond. Dive down the left side of the pond to find more Purple Coins, head all the way to the bottom of the pond to find a Power Moon.

After doing so, return to the surface and capture one of the Pokios. Use it to move across the platforms that wrap around the pond on the right, and then jump to the next white wall and use the Pokio's beak to fling upward. As you continue upward, make sure to dodge or knock away any oncoming Bowser Bombs. After you pass the first launcher, you will have to dodge three additional bomb tracks of three different levels of the castle. Head all the way up the path to reach the Outer Wall.

As you reach the Outer Wall, ditch the Pokio in order to battle and defeat the next Ogre. As you're battling him, lure him inn dropping his hammer down upon the nearby boxes to obtain an extra Power Moon. After defeating him yet still before moving forward, check the lower roofs to find a path that lead to some question mark blocks. From there, look around the corner to find Captain Toad and another Power Moon.

Since the main path you'll eventually come to will end in another wall, you will need to return to the platform below to capture a Poki in order to scale said wall. As you ascend it, make sure to remain focused so you don't fall into any deadly poison. If you do, you should come to a moving circle that will ultimately see you obtaining more Purple Coins. There will also be a second moving circle, one that will allow you to grab more Coins as it brings you to the top of the wall and the next checkpoint.

Once at the top of the wall, you will discover there is yet another wall that you must climb, one that is all the more difficult to scale. You'll begin by quickly needing to move upward among the moving walls going left and right. If you aren't quick enough or if you don't make the right move, you will be dropped into poisonous goop below. Do your best to position Mario in the center whenever you can, just so you will have a safe spot to fall down in case you do hit a metal patch. There will also be a spiked wall that you will have to dodge, but you can always fling yourself over it in you need to get to the opposite side.

Once you're near the top of the Inner Wall, hang to the left to continue your way to the top and bring Mario to the Grand Keep Entrance. Once you do, it appears as though all you must now do is use the Spark Pylon to reach Bowser on the roof so you can battle him. However, like usual, Bowser has another plan in mind. He quickly escapes and heads off to his wedding with Peach, which just so happens to be taking place on the moon. Yes, the moon. So, instead of battling him, the Broodal you thought you had finished off will make a return, this time control a giant mechanical machine.