Super Mario Advance 4: SMB3 (GBA) - Enemies

[Crazy Koopa]

Yes, the Bumpties were part of World-e. I remember seeing them in a video of an unreleased level featuring them and a whole lot of other unreleased levels with all those other enemies.

Ah, I found the guy who posted nearly all of those levels:
http://www.youtube.com/user/copyRIGHThunter