This is from Gamefaqs, but the guy's pretty credible.
EDIT: Thread on GFaqs (it probably won't be around long): http://boards.gamefaqs.com/gfaqs/genmessage.php?board=928518&topic=41252075
EDIT: Clarification! Dedede throws a capsule, which can contain any item. Not the item itself.
Thoughts? If Dedede can randomly throw Smash Balls with items off...Every now and again he can throw a capsule. Seems to be less common than Gordos, but not by THAT much.
Even in items off. And even the Smash Ball.
_____________
I was just surprised when I was trying to chuck minions to eat in Training, and a Super Mushroom Appeared, then a Smash Ball.
_____________
Well, here's what I saw with Items off:
Warpstar
Pokeball
Smash Ball
Banana
Explosion
Food
_____________
(About the "explosion")
It was either a Bob-Omb from the capsule exploding, or capsules themselves can still explode. I don't know.
EDIT: Thread on GFaqs (it probably won't be around long): http://boards.gamefaqs.com/gfaqs/genmessage.php?board=928518&topic=41252075
EDIT: Clarification! Dedede throws a capsule, which can contain any item. Not the item itself.