Yes, I know. Trying to cross-reference this leak to prove its legitimacy is a lot harder than I thought it'd be. My search engines in particular are not the least bit helpful at any rate, but I kind of find it shocking that as far as I can tell, somebody didn't at least try to break the rules. I know it's Japan and all, but you'd think there'd be some American fans that would also try and leak such information.
But hey? The easiest way to confirm the leak is to either get a leaked image of R.O.B. (from Nintendo, mind you, in a similar vein to Mr. Game & Watch and presumably Jigglypuff), or for Jiggly to get confirmed via pic of the day. The hard way, on the other hand, is trying out as many sources who are willing to spill the beans.