List the Pixar movies that were nominated for Academy Awards but did not win.

Context: Pixar has produced 26 feature films, starting with Toy Story, which is the first fully computer-animated feature film; its most recent film was Lightyear. The studio has also produced many short films. As of July 2019, its feature films have earned approximately $14 billion at the worldwide box office, with an average worldwide gross of $680 million per film. Toy Story 3, Finding Dory, Incredibles 2, and Toy Story 4  are all among the 50 highest-grossing films of all time. Incredibles 2 is the studio's highest grossing film as well as the fourth-highest-grossing animated film of all time, with a gross of $1.2 billion; the other three also grossed over $1 billion. Moreover, 15 of Pixar's films are in the 50 highest-grossing animated films of all time.
Pixar has earned 23 Academy Awards, 10 Golden Globe Awards, and 11 Grammy Awards, along with numerous other awards and acknowledgments. Its films are frequently nominated for the Academy Award for Best Animated Feature, since its inauguration in 2001, with eleven winners being Finding Nemo, The Incredibles, Ratatouille, WALL-E, Up, Toy Story 3, Brave, Inside Out, Coco, Toy Story 4, and Soul. The six nominated films that did not win are Monsters, Inc., Cars, Incredibles 2, Onward, Luca  and Turning Red. While Cars 2, Monsters University, The Good Dinosaur, Finding Dory, Cars 3  and the aforementioned Lightyear were not nominated. In addition, Toy Story 3 and Up were nominated for the Academy Award for Best Picture.
On February 10, 2009, Pixar executives John Lasseter, Brad Bird, Pete Docter, Andrew Stanton, and Lee Unkrich were presented with the Golden Lion award for Lifetime Achievement by the Venice Film Festival. The physical award was ceremoniously handed to Lucasfilm's founder, George Lucas.

Answer: Monsters, Inc. (2001), Cars (2006), Incredibles 2 (2018), Onward (2020), Luca (2021), Turning Red (2022)