One guy looked like Don Knotts. Ha.
Actually, after Scooby met the celebs, it was all over.
I don't totally hate Scrappy Doo, either. It can be argued, Scooby and Shaggy were so chicken shit scared of anything that it almost required teaming them with a hot-headed twerp to keep them in the action.
Actually, without Don Messick...Scooby just never sounded quite right.