A friend and I have been trying for about an hour to remember what character we're thinking of. Morse, from Balto, reminded us.
It's his underbite, with the way the lip comes to a point, the teeth sticking out, and the bug eyes. We think it was either a dog or a fish. Kyle, from Despicable Me, is pretty close, but has too many teeth and his mouth is too round - we also think it was 2d animation.
The pike from Sword in the Stone is likewise similar, with the underbite and pointy teeth, but his jaw is too long, and we think it was more of a comedic relief character than the pike.
Overall, the character was more comic relief; we think it went around biting people a lot or something for comedic effect. No talking. Anybody have any ideas?