I'm pretty sure some people already had this idea but I'm gonna discuss about this anyway.
But to others I been hearing " OH Sora should be in SSB", "No he should be in PS All Stars cause hes Playstation!"

But in my opinion, Sora should be in SSB, And Riku should be in PS All Stars.
I also made this image to give the general idea.

But you know whats so weird when I was making this image? Riku's clothes (Blue and Yellow) match the same color as PS All Stars logo, and Sora's clothes (Red and White) match the same color as the Super Smash Bros logo. ITS DESTINY!!! lol  :blink:

 

 

 

That'd be amazing, but that's so unlikely....

Oh my gosh... Riku's parachute pants. 

A kingdom hearts fighter! I want one SO bad. OR at least make a Big KH interaction game (preferably a handheld) where you can make a character level them up battle, trade items, battle online, team up, do missions, travel to new exciting worlds, keyblade creation, tournaments and possibly merchandise! heh heh.

 

I have designs if anyone is interested! heh.

 

(Just please don't steal them I am wanting to propose it to Square Enix) 

then in playstation all star's is possilable dlc mybe but SSB not likely

REALLY REALLY unlikely, but I guess it would be cool lol

It would be nice but I reaaaaaaaaaaaaaallllyy doubt it would happen.

Sheesh guys, at least show some hope of a possibility, one man can't make a change by himself lol.

Sheesh guys, at least show some hope of a possibility, one man can't make a change by himself lol.

One person can. I follow you don't worry with a little convincing or some pestering we can make this happen. 

I'd rather see them in SSB. Such day may never come... (wishes otherwise)

Sora for Super Smash Brothers IV and Roxas for Playstation All-Stars Battle Royale DLC :].