Most of the movies on this list of awful movies based on animated shows share at least one major trait: they were made not because anyone involved gave a damn, but because the studio wanted to milk an already popular brand, even, in some cases, when said brand's popularity had peaked decades prior.
And while you may correctly point out that some of the films on this list originate with source material other than cartoons, they're included if the live-action version incorporated anything that originated in the animated version. Fair enough?
From racial miscasting to barely coherent storytelling to bad 3D post-conversion to The Daily Show's Aasif Mandvi as an unconvincing arch-villain, The Last Airbender is like a perfect storm of badness, especially when compared to its hugely popular animated source material.
And everyone knows it except director M. Night Shyamalan, who still insists his trainwreck is and was popular with children.
Actors: Nicola Peltz, Jackson Rathbone, Seychelle Gabriel, John Noble, Summer Bishil, + more
Initial Release: 2010
Directed by: M. Night Shyamalan
Also Rankedsee more on The Last Airbender
Dragonball is a cartoon so stylized that making it in live-action is a fool's errand to begin with, and the moment anybody even attempted to style Justin Chatwin's hair into a Goku 'do, it should have been a red flag.
By the time he turns into a giant were-ape at the movie's climax (yes, seriously), the accumulated red flags ought to have summoned a herd of angry bulls. The video above sums it up best.
Actors: Emmy Rossum, Jamie Chung, James Marsters, Chow Yun-Fat, Ernie Hudson, + more
Initial Release: 2009
Directed by: James Wongsee more on Dragonball Evolution
In the first live-action Inspector Gadget, Matthew Broderick makes for an okay substitute for the Don Adams-voiced incompetent detective.
French Stewart is NOT an okay substitute for Matthew Broderick in the straight to DVD sequel.
Actors: D. L. Hughley, Jeff Bennett, French Stewart, Bruce Spence, Elaine Hendrix, + more
Initial Release: 2003
Directed by: Alex Zammsee more on Inspector Gadget 2
The Scooby-Doo movies written by James Gunn are surprisingly not terrible. So of course some studio executive somewhere had to say, "We're not screwing it up enough! Fire everybody and start again with a prequel!"
At least, you can assume that's what was said. It's the only explanation for the clip above.
Actors: Frank Welker, Robbie Amell, Hayley Kiyoko, Garry Chalk, Lorena Gale, + more
Initial Release: 2009
Directed by: Brian Levantsee more on Scooby-Doo! The Mystery Begins