SPOILER ALERT: The following message contains information about Shantae: Half Genie Hero. If you have intention of playing the game, please read under your own risk.
Well, as Half Genie Heroe has been recently released, I think this goes for Shantae. She has better equipment (a magic tiara that grants her infinite magic, a belt that halves his damage intake etc), new magic spells (a single fireball, triple fireballs and a flamethrower, a storm cloud, an electric orb and a lightning, a pike ball, super pike ball and many orbital scimitars, a bubble shield that blocks projectiles, a bubble shield that returns projectiles with more strenght and a bubble shield that renders her invulnerable without preventing her to attack or move, etc), far more health, can instantly recover from flinching, an useful dodging move, a faster, more ranged spammable hair whip, a whole lot of transformations (monkey, elephant, bat, mermaid, harpy, arachne, crab, dryad), a recover dance that restores all her health, a dance thay spontaniously damages all enemies at screen, and finally can carry a lot more healing items than Shovel Knight can.
Also, as for feats, she previously demonstrated that she can avoid meteor-like cannonballs from the sky, freaking lazors, magic pistol bullets at point blank ( range ( both normal size and cannonball size). She damaged enough the Pirate Master at approximately half his strenght with Risky's equipment while being fully human, then procceded to greatly damage him at his full power while her only having her whip attack, THEN curb-stomping him with her genie part restored, and then utterly destroying him once and for all with Risky's help firing a couple of cannon balls from far away (she had to keep attacking him in order to prevent him from avoiding the cannon balls). Worth noticing that when she recovered her half genie powers, her whip, that previously did 8 damage point at base, now did 999 damage points. In Half Genie Hero, she can easily dispose of Risky Boots twice, fight and defeat Hypno Baron and Squid Baron at the same time while they team up, defeat Ammo Baron with his whole army and destroy a powerful, seemingly sentinent magic warping dynamo and four mentally controlled genies at the same timem For everythin above stated, I can only give my point to Shantae