Mallory Archer (“Archer”) and Fran Sinclair (“Dinosaurs”)
Both of these characters are/were voiced by Jessica Walter, who also starred as the alcoholic mom in “Arrested Development.”
The Brain (“Pinky and the Brain”) and Morbo (“Futurama”)
Maurice LaMarche tried to take over the world as The Brain, as well as reporting the news on “Futurama.”
Princess ‘Kida’ Kidagakash (“Atlantis: The Lost Empire”) and Susie (“Rugrats”)
Both girls are voiced by Cree Summer.
Spongebob (“Spongebob Squarepants”) and Dog (“Catdog”)
These are just two of the MANY voices Tom Kenny provides. He also voiced characters on “Adventure Time,” “The Powerpuff Girls” and “Rocko’s Modern Life.”
Homer Simpson (“The Simpsons”) and Grandpa Phil (“Hey Arnold!”)
Dan Castellaneta gives the voice for both ol’ Homer and the Grandpa on “Hey Arnold!”
Optimus Prime (“Transformers”) and Eeyore (“Winnie the Pooh”)
Yes, this is a weird combination. Both were voiced by Peter Cullen.
Jake the Dog (“Adventure Time”) and Bender (“Futurama”)
John DiMaggio is the voice behind these fun characters.
Philip J. Fry (“Futurama”) and Doug Funnie (“Doug”)
Billy West voices these two guys along with Ren AND Stimpy, several other “Doug” and “Futurama” characters, Bugs Bunny on “Space Jam,” and… the red M&M from those commercials that have been on forever.
Abu (“Aladdin”) and Scooby Doo (“Scooby Doo, Where Are You!”)
Clearly a fan of animals, Frank Welker was both the voice of Scooby Doo and Abu.
Klaus (“American Dad!”) and Daffy Duck (“Space Jam”)
Also a fan of animal voices, Dee Bradley Baker voiced Daffy Duck on Space Jam as well as that sassy little goldfish on “American Dad!” Fun fact, he also voiced Olmec on “Legends of the Hidden Temple.”