Ghost Castle 2 done in 312 frames (from selecting the level on the world map to the first frame when Kururin looks happy).
I used a first wall clip to escape the starting zone and go out-of-bounds, then another one to go inbounds again and reach the regular goal zone.
The previously known wall clipping techniques did not work here for some reason, so I had to find new ones.
There are probably faster strategies, but this is a good start.
Savestate: world map on Ghost Castle 2.