Rick Broiler is a make-up artist.
He was famous for monster-movie creations. He worked on Mutant Baby, Worms, Kaiser Kong, Chiller, A British Werewolf in America, The Wacky Instructor, and one with a guy with two heads.
Scooby-Doo (DC Comics)
Since all monsters were done by CGI at the studio now, he was doing things like aging effects instead. He created the monster suit worn by Doug Bones, and provided realistic mouth movements for the creature by remote control, in order to prove to director Tom Burden that monster costumes could be more effective than CGI and should be used on his new show. (Man Of A Thousand Monsters!)