If I remember correctly, this is the level where you need to fly up a very long distance while carrying a koopa shell. You then chuck the shell at some blocks to open up an entrance to a pipe that leads to the exit, correct? There are infinitely-regenerating racoon leaves in the level to allow you to fly up, but it is almost impossible to get the necessary approach speed without getting hit by the annoying white-block-chucking beetle things. So, the only way I've ever beaten the level was using P-wings. If you lose the P-wings in the level, however (which is very easy to do), you are doomed.
