While many fictional Middle Children have been immortalized in TV & Film (see this list from Zimbio), the animated Middle Children gathered here are for real! All verified by extensive study of cartoon birth records and analysis of comic strip DNA.
In no particular order, here is the “Smack Dab List of Best Animated Middle Children:”
LISA SIMPSON (Older Brother: Bart; Younger Sister: Maggie)America’s favorite sax addict is ranked 11th on TV Guide’s list of “Top 50 Greatest Cartoon Characters of All Time” -- tied with her older brother. Intellectually superior to her parents with an IQ of 159, Lisa is the voice of reason in the family, yet feels like an outsider and often wonders if she was adopted. What Middle Child hasn't had the very same thought?
For the most part, Lisa had to raise herself as Homer and Marge were busy dealing with Bart, as seen in “Lisa’s Pony” (Ep.8 Season 3). As an infant, she changed her own diapers. Doh! While this lack of nurturing made Lisa fiercely independent, it also made her feel like her parents don’t understand or support her. When trying to build Bart’s confidence before a golf competition, Lisa tells him, “Having never received encouragement, I'm not sure how it should sound, but here goes: I believe in you.”
Early signs of Lisa’s Middle Child issues are evident with her heartbreaking rendition of “Happy Birthday to Me” in “Stark Raving Dad” (Ep. 1/Season 3). There’s a story in Simpsons Comics #89 titled “Lisa in the Middle.” And Lisa’s Middle Child Syndrome surfaces again in “Peeping Mom” (Ep. 18/Season 26)...
SIMON SEVILLE (Older Brother: Alvin; Younger Brother: Theodore)The list of famous animated rodents is an impressive one: Mickey & Minnie Mouse, Mighty Mouse, Danger Mouse, Chip & Dale, Rocky the Flying Squirrel, Fievel Mousekewitz, Jerry, Itchy, Speedy Gonzales, and of course, Alvin & the Chipmunks.
The birth order of the singing Seville siblings has been the center of worldwide controversy. Some fan sites suggest Simon is eight seconds older than Alvin. In fact, in “The Sub,” Ep. 29B/Season 2 of Alvinnn! and the Chipmunks, Alvin does refer to himself as the “Middle Child.” But as seen below, all questions are laid to rest in “Grounded Chipmunk,” Ep. 60/Season 6 of The Chipmunks, when Alvin reveals the truth! Having previously established Theodore as the runt of the Seville scurry, Simon is confirmed as the Middle Chipmunk, securing his place as the sole inductee in the Animated Middle Rodent Hall of Fame.
Scottish author and playwright J.M. Barrie named John after John Llewelyn-Davies, one of the brothers whose family was the inspiration for the boy characters in Peter Pan. True Pan-ophiles also know John shares the same middle name as the world’s most renowned diminutive Middle Child -- Napoleon.
LINUS VAN PELT (Older Sister: Lucy; Younger Brother: Rerun)
Linus is depicted as a loving older brother to Rerun, who he actually named. Upon learning about her new baby brother, Lucy comments that having another little brother is like watching reruns on television, and Linus suggests naming him just that. Rerun is often embarrassed by some of Linus’ more glaring peculiarities. These include, but are not limited to, Linus' unwavering belief in the existence of the Great Pumpkin and his obsession with his ever present security blanket, which he’s often mocked for by other characters as well. His insecurity is further evidenced in his persistent sucking of both thumbs. He insists one is sweeter than the other, by the way. But nothing captures Linus’ true Middle Child nature more than his loyal best-friendship to Charlie Brown. And that cannot be easy.