Piranha Plant's Bridge Uproot (FINAL)- 655F-000-0179-1324
The reason I say final is that now there's a spiked wall, which is basically impossible to pass. Bowser, you can aim for world record on my levels but please don't break them

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Bowser's Bridge Ballista- 6DF9-0000-0179-6209
Bowser's forces have blockaded a sky bridge(yay more bridges and more airships). Take on multiple airships and face Bowser in a Koopa Clown Car.
Flying in the Fiery Skies- CC69-0000-017F-1F88
Another airship? Eh, this one's different. Run on conveyor belts to fill you P-Meter and fly across the sky. Avoid fire-based obstacles and go for the best time
Bowser.
Castle Infiltration- 0A5A-0000-017F-3357
This is the level my brother and I made. Well, the first part and concept were him. Probably my (or our) hardest course yet. There's two paths, the roof or the sewers. The sewer is faster, but it's not easy. The roof includes Chain Chomps and an area with Magikoopas constanty conjuring enemies while you're on an elevator. The part where they meet is on the roof again, but with a Winged Boo in a clown car and lava bubbles in clouds. The next area, well it's exciting but I shouldn't spoil it. Also you fight Bowser.
(ps don't go in the front door that's not an infiltration that's where they want you to go)
Well, that's 8 out of 10 courses. I'll probably make an underwater level next and then leave an extra space. (asking for stars ahead) I put a lot of care and effort into these levels, so if you know you enjoyed it, give it star. I may reupload other courses just for improvements and bugs or even revamp them. After that's it back to ideas. (k asking for stars is over)