On this page I'll list movies that combine live-action with traditional cel animation. (Stop-motion elements will not be counted.) The movies may be primarily live-action or primarily animated, or roughly equal, as long as there are both elements within the movie itself (opening and closing credits will not be counted). Please let me know (lonewander@gmail.com) if you can think of any films I've missed.
See also TV Tropes's Roger Rabbit Effect and Wikipedia's List of films with live action and animation (which include CGI and stop-motion)

movies

Bedknobs and Broomsticks
The Congress
Cool World
Enchanted
Forbidden Planet
Joe's Apartment
Last Action Hero
Looney Tunes: Back in Action
Mary Poppins
Mary Poppins Returns
Natural Born Killers
Osmosis Jones
Pete's Dragon
The Phantom Tollbooth
Re-Animated (TV movie)
Song of the South
Space Jam
The SpongeBob SquarePants Movie
The Three Caballeros
Who Framed Roger Rabbit

TV series

The Lion, the Witch, and the Wardrobe
Lizzie McGuire
Son of Zorn