Board Thread:Questions and Answers/@comment-1398428-20140913004747/@comment-25882232-20141217021107

I don't agree with the theory either, but I can no more make it go away than I can stop trolls from trolling, or haters from hating.

There's pretty strong in-game hints that Rosalina's home planet is the same as Mario's. On the other hand, I've never seen any evidence that time goes backwards when the universe is "reset," as happens in the end of the game. I could go deeper, but that's the biggest evidence I personally have against the theory myself.

Or actually, even better – anything that isn't official canon isn't fact in the Mario universe. Period. That's how fiction works.