I imagine Ridley would play like a Smash Adapted Gargos but with portals and minion stuff replaced by tail and fireball attacks.
The idea of him summoning Zebesians or some kind of space pirates seems amusing though like Gargos with his little demons, but yeah, it'd be out of left field.
Since it was brought up, I've always been mixed on the idea of Ridley being in a Mobster Hunter. I mean it could work and would be cool to see in hindsight, but beyond that, I don't know...
Always said Charizard (base form) would badly lose to him in a real fight, but with mega stones I admit he'd might have the advantage in some areas. Hard to sugarcoat it as far as that...
I wouldn't care for a glass cannon Ridley personally, but you know most of us would take anything by this point.
EDIT: Wanted to say this in another reply but so as to not get penalized for double posting... Just wanted to get this off my chest real quick, though kind of an afterthought, but regarding the poster from the previous page and anyone who might still want to paint us in a negative light because of how the whole SSB4 speculation went, look, we're not the only ones ever whose acted in denial or played some mental gymnastics about something initially when evidence has been stacked against us. Yes, it was overly desperate (and stupid perhaps) to still hope for Ridley in any way after that Pyrosphere shadow tease, but IsmaR and some (from what I remember) kinda encouraged others to still support him to the bitter end, to lessen the flames being fanned I guess, and I just went along with it so as to not be a debbie downer for those still pulling for him, even though I always knew in my mind since then that he was gonna be a hazard and nothing more. It was a lose-lose situation no matter how we all would've ended up taking it initially.
Hell, when K. Rool's Mii costume came about, I figured that would've been it for him (which turned out it was), but others still pulled to have him as a full character and fought to the bitter end, stubborn as it may have been, not unlike some of us with Ridley, but hey. It's just kinda the nature of fanbases at times. :/