Even when I left out movies in which two people didn't switch bodies, they just became older versions of themselves, like Big or 13 Going on 30, there were plenty of other legitimate mind swapping motion pictures out there.
I left out comic books, so no Superior Spider-man in which Doctor Octopus becomes Spidey.
I included a couple of TV shows that managed to use the premise well, but I had to leave a whole bunch out (8 Simple Rules, The Adventures of Jimmy Neutron: Boy Genius, Adventure Time, American Dad!, Angel, Boy Meets Girl, Buffy the Vampire Slayer, Charmed, Community, Eureka, Family Guy, Farscape, The Flintstones, Futurama, Glee, Haven, Highway to Heaven, I Dream of Jeannie, Justice League Unlimited, Night Gallery, The Prisoner, The Simpsons, Smallville, The Smurfs, Supernatural, The X-Files, my fingers hurt typing all that and I didn't even scratch the surface!). Did I mention the body switching story has been used a lot?
Then I tossed out some foreign films about the subject that most people wouldn't recognize anyway (Alison's Birthday, Dating the Enemy, Dogmatic, Ghost Graduation, Help I'm a Boy, Here Comes the Bride, Just Follow Law, Put a Man Into Your Life, The Secret) and movies in which the mind swap wasn't the main part of the plot like Scooby-Doo or like Face/Off which wasn't technically a body swap, and I was finally left with this still long but somewhat manageable list. Enjoy!
Matt Perry switches with his younger self, played by Zac Efron.
Eighty-one year old George Burns switches with his 18 year old grandson, played by Charlie Schlatter.
All of Me
A dying millionaire, played by Lily Tomlin, tries to switch into the body of a younger woman but instead ends up in the body of her lawyer, played by Steve Martin.
All Screwed Up
Two high school kids, a jock and a nerd, switch bodies.
Jason Bateman, married with kids, switches with his best friend, Ryan Reynolds, who's a bachelor and womanizer.
Dream a Little Dream
An accident puts the consciousness of a dream researcher into the body of a bratty teenager, starring Cory Feldman, Jason Robards, Corey Haim, and Piper Laurie.
Freaky Friday (1976)
This is the gold standard by which all others in the genre are measured, starring Jodie Foster and Barbara Harris.
Freaky Friday (1995, TV)
Shelley Long starred in this TV version of the classic movie.
Freaky Friday (2003)
This remake starred Lindsay Lohan and Jamie Lee Curtis.
Gilligan's Island, "The Friendly Physician" (TV)
One of the best episodes had a mad scientist swap the minds of the castaways!
Here Comes Mr. Jordan
A boxer who dies too soon is given a second chance as life in the body of a millionaire playboy.
The Hot Chick
A mean-spirited teenage girl switches with an older man, starring Rob Schneider, Anna Faris, and Rachel McAdams.
It's a Boy Girl Thing
Sworn enemies find themselves in each other's bodies.
Like Father Like Son
A dad, played by Dudley Moore, switches with his son, played by Kirk Cameron.
A Saintly Switch
Vivica A. Fox switches with David Alan Grier.
Ben Kingsley is a dying rich man who switches his consciousness with a young man, played by Ryan Reynolds.
Star Trek, "Turnabout Intruder" (TV)
Not one of the best episodes, but still interesting as Captain Kirk switches with a lady who tries to take control of the U.S.S. Enterprise.
One of the earliest examples of the cliche, a husband and wife switch bodies in this 1940 comedy directed by Hal Roach.
Vice Versa (1948)
Peter Ustinov directed this early mind-swap film.
Vice Versa (1988)
Judge Reinhold switches with Fred Savage.
Wish Upon a Star
A young girl switches with her popular older sister, starring Katherine Heigl.
Even whittled down, that's a lot!