4. Scooby Doo
A typical episode of Scooby Doo contained more plot twists and chase sequences than an entire summer's worth of blockbusters. Granted, the plot twist was usually that the 'sea monster' wasn't Hank the disgruntled fisherman after all, but Sam the greedy fairground owner. And yeah, okay, maybe the chase sequences usually did consist of everyone running down the same hotel corridor only to bump into each other in the middle, but still. This didn't make it any less terrifying, which is an adjective that every cartoon featuring four teenagers and a Great Dane really ought to be striving towards. Put simply, it was good family entertainment that never seemed to be off the telly. There was one thing, though, that really dragged it down. Some believe it killed the show altogether. Yes, even animal rights activists would agree that Scrappy-Doo was annoying, an abomination and had no right to exist. And so when the 2002 film decided to feature Scrappy-Doo; well, it was time for the audience to go walkies. And as if that wasn't enough, it was filmed not as a cartoon but, yep, live-action. Well, Scooby wasn't, obviously - he was a rather dubious CGI creation who no child would ever wish to discover on Christmas Day. Sarah Michelle Gellar isn't quite yet out of Buffy mode and Freddie Prinze Jr only served to make Fred even duller and so, ultimately, the only aspect of the film that deserves any sort of praise is Matthew Lillard's unnervingly accurate impression of Shaggy. And when Matthew Lillard's running the show, then you really have to wonder what type of film you have on your hands.