There are only a handful of Beast-themed enemies in this game. We need more. I would suggest Raptors. Didn't see any threads asking for them actually being posted in, so yeah, here you go.

The only excuse this suggestion has though, is that Nick himself said these were actually considered for SK at one point.

Personally I want them to be Paleontologically correct in that they have really fabulous plumage (Heck, might as well let them come in all the accessory color themes).

And then I want them to throw the oversized Paleontology textbook out the window and smash a random pedestrian's skull by giving them various crazy attacks so that people can shut up about the lack of challenge now that a bunch of broken glitchy stuff and non-glitchy why-did-they-get-rid-of-that stuff has been removed.

I'm not settling for them being implemented without having anything less than all the items on the following list:
-a Stun-inflicting Sonic Roar
-a Status-inflicting Breath Attack
-Pierce-damage Claw Kick with huge knockback
-Pierce-damage Bite with considerably less knockback but a lot more... bite.
-Tail Whip that really doesn't do anything but knock you (and enemies) around if you try to take it from behind
-Really capricious A.I. that results in them attacking other enemies in addition to Knights- setting off status Lichens, kicking Blast cubes that are about to blow into players, getting completely distracted and beating the crud out of all the Devilites for you (and then setting on you again once they're gone or if you try to grab the coins from the slain enemies before he's done with all of them).
-Gremlins who come riding in on Raptors.