What Character would you like to see in a Smash Bros Game?

[E-Man]

I imagine Rexes also at least register somewhere as a high-intelligence species, as most things seem to do in Mario Land (er, World? Country?), so it's possible some individual Rexes have also traveled to the Bean Bean Kingdom.

Not even in the RPGs do they show Rexes with anything resembling sentience as far as I know. I'm not saying that they're not, but as far as the Mario canon goes, they could have either migrated there like normal animals do, or someone decided to repopulate Hoohoo Mountain with them for whatever reason. Heck, for all we know, they may as well be some type of subspecies of Rex with minimal differences at most that is native to the Beanbean Kingdom.

EDIT: By the way, Kriven, this is slightly unrelated, but when you mentioned Country to describe Mario's world, I couldn't help but think of Mario and Donkey Kong crossover that actually does a better job of touching upon elements of DK's games.