It can only be Zoonik, the ultimate Platformer Mashup. He's got Sonic's quills, Zool's Head, Mario's Overalls, One of Tail's two tails, gloves which could come from anyone and I think Earthworm Jim's Gun.

You're missing The fox tail, the quills need to droop more, and something bugs me about the left foot. Otherwise, Spot on Lineart wise