One of the superheroes who make up the Justice Friends, who have their very own spin-off show from Dexter's Laboratory.
His name is an hilarious conflation of Van Halen, the terrible, fearsome rock god, and Valhalla, the meeting-place for dead Norse gods and warriors. It's been a couple of years now since I wrote this up, and only recently has the flow of tears of laughter begun to slacken.
Val's costume is a similar clash of cultures, the Viking and the Heavy Metal - he's got a flying V and a hat with horns on it - and personality-wise, he's the dumb one of the group. As distinct from Krunk, the big dumb one, and Major Glory, the dumb one.