Since the topic is on the Smash roster, I realized that Artificer, Gourmand and maybe also Saint from Rain World could make for some interesting characters. Artificer could leap around the arena with explosive jumps and deflect projectiles and other fighters with her concussive blast. Gourmand would primarily fight using weight; divebombing, ramming, and tumbling over enemies. And Saint wouldn't be able to do hand-to-hand combat, but would instead retreat to a safe distance before ascending other fighters. Of course, they don't have preexisting 3D models, but they do have art depicting such forms.
- https://scratch.mit.edu/discuss/topic/747546/?page=75#post-8137112