Let's slap a big ol' "Rumor" disclaimer on this one before we go any further, shall we?
Just like the rest of the world, Professor Layton has gone and gotten himself an official Twitter account, where probably some intern over at Nintendo posts riddles and other assorted intellectual stimuli. Color us equally surprised and intrigued then when the good professor tweets about his invitation to a "Grand Smash Tournament." Hmmmmmmm.
Of all Nintendo's IP, Professor Layton is probably the least suited for participating in a round of fisticuffs (Up + B = riddle attack?) but attend he did, in an etheral sort of way.
Well, isn't that something. Geno, of Mario RPG fame, is perhaps an obscure choice for a fighter, but Mega Man and Little Mac would seem like natural fits to the roster.
With Brawl just over a year old now, it shouldn't be much of a surprise to learn that Nintendo is at least considering contestants for the next inevitable iteration. Still, Layton's Twitter account seems like an odd (yet clever, like the professor himself) outlet for teasing the info.