I would think that wander and snake would be the hardest. Wander for having not many moves (really only a bow and a sword) and snake has to be completely different from SSBB to avoid a lawsuit.
Wander has not many moves, OK.
Parappa has no moves at all.
This isn't an excuse, be realistic.
PSASBR vs Any Smash Other than SSB1 is an unfair comparison when it comes to roster size. It's highly suggested that roster vs roster is left out until PSASBR 3 or 2 but for now. The roster count should always be Original All-Stars vs Original SSB since the original has to get its engine down before it works on roster size.
PSASBR has clones just like SSB. It's kind of sad really. Two Coles? Honestly...
Cold and Evil Cole aren't clones in the slightest actually if you payed attention to their gameplays.
Meh, I just want the 'big four' to be added for fan service more then anything else - none of them ( save for Cloud maybe) would make for interesting characters in terms of playstyles, in my opinion atleast.
Any character can be interesting in terms of playstyles. I mean Parappa? They did pretty good with him for what I've seen.
It all depends from the creativity of the developer.
Actually, in Dissidia 012 his play style is very dull and would most likely be dull in this game on the other hand in Dissidia 012 Lightning has the most unique play style and the hardest character to use in the game.