i doubt this is even possible without TAS. I cant get past the 1st stage p switch without savestates. And even that 1st mole was unfair.
If TAS is not your thing dont waste your time.
But im sure would like to be proved wrong.
ps. with savestates ive got to the 2ng stage. But then i couldnt figure out how to get past the part after the chuck after the checkpoint. It seems you should keep the shell for a shell jump on that 2 coins?! but its impossible (or almost) to make the jump before it without using the shell.