And since they are toys, who's to say there cannot be duplicates along with their spirits?
So now I'm gonna list my Shantae spirit/fighter combos I promised earlier today:
Sky: Yoshi, uses up special a lot along with Poke Balls that summon bird-like Pokemon
Bolo: Someone beat me to this, but yeah. Richter who trips a lot and is stunned by female assists.
Rottytops: Ridley. Uses forward tilt a lot. Stamina battle, but Ridley revives if not pushed offstage quickly, and speed is increased.
Risky Boots: Wolf. Uses his specials more, also has a Killing Edge.
Techno Baron: King K. Rool. He is tiny and flees from battle, but is accompanied by a giant Palutena.
Ammo Baron: Bowser. Has an infinitely spawning team of small Bowsers, all have permanent jetpacks. The main one just hovers behind his team while they attack.
Squid Baron: King Dedede. Alternates between using up special and dash attack. Food spawns periodically
Holly: Pokemon Trainer (Leaf). Uses a giant Ivysaur. Explosive items only.
Dagron: Ridley (again). Giant and jumps high in the air before descending to attack, then flies up again.
Warrior guy: Simon. Black silhouette and giant, but only uses moves involving punches and kicks.