A/N: battle of beings who have the power of manipulation of dreams.
Dreamy Bowser.
Freddy Krueger.
Austin: freddy may have dream manipulation. But so does dreamy bowser. Hell, dreamy Bowser shook the dream realm just form when he first transformed. Plus, as regular bowser, he's done nearly universal feats like surviving a black hole.
(Not so much about the supernova though).