Billy’s one speaking appearance is as a member of the “Dork Parade” (along with Sheena and Brainy) at the start of “Eugene’s Bike”. He has an albino worm collection, although every now and then one finds its way underneath the soles of Helga’s shoes…

Voice: Sam Gifaldi
Eugene’s Bike
Billy also has a speaking (well, “screaming”) role in “Mugged”, but there was no credit given