Scooby Doo is the main protagonist in the Scooby Doo series.

The 13 Ghosts of Scooby Doo

"That's Monstertainment"

One of the 13 Ghosts, Zomba, traps Scooby and the Gang in the movie "The Son of the Bride of the Ghost of Frankenstien", Scooby took the role of "FrankenScooby", creating a monster dog. After the Monster Dog is trapped under rubble, Scooby eats a box of Scooby-Snax to get super strength ala Pop-Eye with his spinch, to save his monster while becoming a Superhero verison of himself.

Shaggy and Scooby: Get a Clue

Operation Dog And Hippy Boy