Yes, but, in Paper Mario...Originally Posted by S.S.
Spoiler Alert!Once you acquired Bowser the koopas and wahtnot were still your enemies, and they're just trademarked as Nintendo enemies.
Also, they're used in Donkey Kong's team in Mario Baseball, so I could see why they'd put them there.
But, the hell, why would Bowser want bananas? Potassium!?