These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Rescued from the Scrappy Heap: Scrappy-Doo is a bit more bearable in this movie, since he's needed to solve the riddles until Shaggy gets enough of a clear head to figure out the last few. Also in the opening, when he heard about ghosts, Scrappy's first thought isn't to fight them, but that ghosts are neat. The two people he seriously confronts in the movie are the butler and the gorilla, neither of whom was a person in a costume anyway.
He also saves Shaggy and Scooby by tricking Billy Bob into getting chased away by a bear.
And Scrappy is the first to think that maybe the escaped ape isn't vicious, but lost and scared. He's right.
Still, it gets annoying at times the way Scrappy solves all the clues.