OMG Fountain of Dreamz!
This is definitely one of the better FoD remixes I've ever heard. I can't find any major bad things about this piece. I personally would have liked the tempo to be slightly faster, but it's fine the way it is.
(Note: He never said it was King Dedede's theme... He just said King Dedede, who you fight at the Fountain of Dreams, is on E at the moment...)