Tim and Travis are the school bullies. They've been there for six years and are still only juniors. They usually only pick on freshman, but they seem to make a special exception for Merton.
But even though they pick on Merton, I still think they're cool for their avid knowledge and use of wrestling skills (one of my favorite scenes is in the Swamp Thing episode where TNT and Tommy and this hippy swamp thing have a mock tag team wrestling match in the cafeteria).
My only complaint is that they do not show enough of their wrestling skills. Why can't they piledrive a freshman every once in awhile? I think it's a simple request...