If you enter the Clouds without registering, then the investigation will be impossible, despite visiting booth 11.
The volume in VIP booth 2 will not be available at all, Sky - too.
And Oswald Forest's room will be completely closed and Oswald himself will not be there.
In this case, the entrance through the outer stairs is obvious and you can jump there with the help of "grasshopper legs".

If you just break into the VIP zone with a fight, you will find...

Doll House - impossible to finish if use alternate way