Here is a TAP.
I cut out the part where you go through the door many times in a row to wind up back at the beginning cuz I thought it would be boring to watch, and I also left out the very end because we've all seen the original SMW Bowser fight and I figured the intended audience would not want to watch that. Considering how much easier the original SMW Bowser fight is compared to the actual level, you can assume I beat it.
You said in the hack description there would be no wall-jumping. Is there something I missed in that one room where I caught the wall to go in the pipe and in the room where I wall-jumped?
--------------------Legacy custom music
How am I so creative? I think taking walks might have something to do with it.
Every single level I will ever make in SMM2 will be easier than Ultra Necrozma.