Franchises that changed tone in a sequel.

Whether is was only for one sequel or the sequel changed the rest of the franchise.

Evil Dead. The first one was a legitimate all-out (admittedly cheesy) horror film. Part 2 turned into a comedy/horror and part 3 was just a comedy.

A Nightmare on Elm Street. I don't remember which part it started, but Freddy turned into a borderline standup comedian. New Nightmare ended up being meta.

The Texas Chainsaw Massacre. The first film was a realistic horror film that almost looked like it was shot documentary style. However, the only massacre in part 2 was what the filmmakers did to the film. It was a terrible campy comedy with over-the-top characters.

Mission: Impossible. The first two films were played as serious action films. But once part 3 hit, they became action comedies.

The Fast and the Furious. Remember when these films were about street racing?