HP3 Pictures

I know there's tons of sites out there, but I couldn't find what I'm looking for, and I'm terribly sorry if this is the wrong place to ask.

I'm looking for a picture of that (sorry if this is offensive to anyone) chubby random black guy that's in Gryffindor house (and had lines, too) from Harry Potter and the Prisoner of Azkaban for an icon I'm about to make. I've seen someone have an icon of it, but now I can't remember who it was. Do you know where I could find a picture of him?

Thanks!