Blue..... BLUEEE........ BLUE SHOES!!!!!!!!!!!!!!
Joke aside... I quite dig most of these, Knuckles got a real glow up, he might just be my favorite now.
I'm not the biggest fan of the execution of metal's design tho... The eyebrows just look weird on him, he'd be better off with a smoother look to his face, also sharper eyes, i think it'd be cool since his shoes are black he just straight up doesn't have pupils, or the pupils are white like in Sonic CD. Bonus points for keeping the detail where his foot has a cylinder that serves as a joint for it to move more naturally
... i'll rant a bit about the blue shoes.. I think they're a little contradictory here, like, Sonic got god damn black shoes, what if tails had black shoes, or the main shoe color being white and the secondary is black, like an inverse of the sonic shoes, since blue is meant to be like an inversion of how sonic has a cold color for his body and warm for his shoes. (despite the fact tails is supossed to have a warm color pallete and compliment sonic instead of being an inversion.. but i'm trying to get within the mindspace of blue shoes, i guess lmao)
If ya want to keep the blue tho, what i'd do is either make the white furr into a light tan, like the sonic 2 beta design and also tone down the blue or have the white be the main shoe color and a lighter blue as secondary.
Also, i would have made it so trevor has shoes that mimic sonic's, since the og tails doll had sonic shoes, but i mean, he kinda already misses the appeal of tails doll, so...
oh, and funny coincidence, i also have a sonic au with a character being renamed or given the secondary name of trevor lol
long story short, i generally like this, but i'm just a nitpicky bitch lmao