Is it possible to clip into the secret area in Pianta 4 and play the secret, and skip level 5? In the same way as going to the windmill and fighting Petey in Bianco 1

No, stuff like that has been checked in every secret, and only Pinna 6 has a loading zone before its shine.

Does anyone here actually know how to get into the bianco loading zones (or where they should be) early? I've been trying to figure it out on my own for all the levels, but I can't get the ones in bianco. I've gotten close with the area for 6 by clipping out of bounds and using the rocket nozzle to get there, but there's an invisible limbo zone like the one in pinna that I can't get past.

they're not there speedrunner, he just wants to know how to get in there.