Newt is the assistant to Baron Von Rothpuppy, the mad scientist.
He is bald, with an egg-shaped head, and he has a hunchback.
He was reluctant to let Scrappy-Doo try experiments with the master gone, but he relented.
He and Von Rothpuppy created a monster, but they didn't consider it truly alive because all it wanted to do was watch television.
Scooby-Doo (Archie Comics)
He let Scrappy-Doo experiment on the monster to see if he could make it more alive with a further jolt of electricity, but this was a failure; the monster's personality remained exactly the same.