There is a secret barrel in Barrel Shield Bust-Up that takes you to the end of the level. First, after you see the 2 bees circling a banana bunch, there will be a hole straight to the right of it with a room with 2 invisible barrels. When you drop down into it, an invisible barrel just shoots you back out, but if you use Dixie's air spin, you should go directly left after you enter the hole. It will take you into a barrel with a 'W' on it and you will be teleported to the end of the level.
Submitted by Santiago Valerio