I only played the 1st 3 Spyros on PS along time ago, and as far as I can remember, he doesn't have much to make him a flavorful fighter.
What did he really do... Breath Fire, Charge, Shoot a Rock/Rocket, and Head Smash? So thats only 33% of his move set? Not to mention the hit boxes on a quadraped would be retarded.
If it did happen, I see only Crash since Crash Warped had plenty of things to fill out his move set.
In terms of supers, both have more than enough going for them there. I say Crashes LvL3 would be a sweeper where he's running from a bear, and is the only one who escapes. Lvl 2, maybe he rides a boar (paradpa style), or uses a mango launcher (a mobile version of Nariko's L2 with less ammo)