Doppelgangers

Many episodes of Hanna-Barbera cartoons had one or more doppelgangers, people or animals who resembled major characters, often leading to cases of mistaken identity.
== The Flintstones ==
* In "The Tycoon", Fred Flintstone was mistaken for J.L. Gottrocks and vice versa.
* "Dino Disappears" showed not one, but four Dino doppelgangers, including Rocky, whom Fred and Barney dognapped by mistake after Dino ran away.
* "King for a Night" was about Fred and the king of Stonesylvania being mistaken for each other after the king shaved off his royal beard.
* "Royal Rubble" had Barney Rubble mistaken for Prince Babaruba, until the real prince showed up at the last minute.
* "The Stonefinger Caper" had Stonefinger send his henchmen after Dr. Rockenheimer. They captured Barney along with Fred when they thought Barney was Rockenheimer.
* The Man Called Flintstone had Fred impersonating Rock Slag in order to capture the Green Goose.
== The Funky Phantom ==
* "Heir Scare" had the gang discovering that Mike Conway's doppelganger had disguised himself as the Marsh Monster as part of a plan to help Henry the butler and Martha the maid claim the Conway fortune for themselves.
* "The Hairy Scary Houndman": The Houndman orders his henchmen to dognap Cromwell, but they take Elmo instead, since both dogs look alike. Later, at the kennels, there are many other bulldogs that resemble Elmo.
== Jabberjaw ==
* "No Helpin' the Sculpin" had the title villain and his henchmen mistake Clamhead for Dr. Thorsten, inventor of a time machine. 
== Jonny Quest ==
* In "Double Danger", Dr. Zin hired Korchek to pose as Race Bannon in order to steal Dr. Benton Quest's formula for his own evil purposes. After Race was captured, Korchek was found out by the monkey Kogo, and later by Jade, who claimed there were some ways a woman could not be fooled.
== Josie and the Pussy Cats ==
* "Swap Plot Flop" had Valerie Brown agreeing to impersonate a princess in order to fool the Evil Eye. Unfortunately, the plan backfired, and both girls were captured.
== Butch Cassidy and the Sundance Kids ==
* In "Double Trouble", Prince Taki is replaced by a lookalike in a scheme to take over the country.
== Godzilla ==
* "The Energy Beast" had Godzilla contending with a monster that became his exact double, and temporarily confused the crew of the Calico and Godzooky.
== Jana of the Jungle ==
* In "The Renegade", Ghost was mistaken for Blanco, another white jaguar that threatened both humans and wildlife.
== The Smurfs ==
* The Johan and Peewit episode "The Prince and the Peewit" had the Smurfs, Johan, and Peewit meeting Peewit's doppelganger, Prince Ingraham. Both boys traded places for a while.
== The Roman Holidays ==
* "Star for a Day" had Happius agreeing to fill in for teen idol David Cassius, since both boys looked alike.
Category:Hanna-Barbera lists
Category:The Funtastic Index