Mentioned characters

• John Quincy Adams
• Alan (grandfather)
• 
  Alfred's dog
• Alfred's mother
• Arminius
• Art Radley

• Biff
• 
  Bill (doll doctor)
• Bitzi's grandfather
• Blanka Rozak
• Bo (aunt)
• Bob (Cereal)
• Brain's cousin
• Brain's grandmother
• Bubby's husband
• Bugsby Brown
• Edward Bulwer-Lytton
• Buster's aunt
• Buster's cousin (Arthur's Birthday)
• Buster's cousin (That's a Baby Show!)
• Busterfield

• Chester (person)
• Chester Read
• Claudia
• Custer

• David's brother
• Dennis
• 
  Derek Montaigne
• 
  Diana Smith
• Doc
• Doctor Danger
• Dr. Bailey

• Eager Beaver
• Eric Beedlemeyer
• Ethel (Bleep)

• Fern's cousin
• 
  Frances
• Francine's cousin
• Francis Haney's mother
• Furmasons

• Gomarus
• Grace
• Griselda Dorffman
• Gustav

• Hank (mechanic)
• Helene-Marie
• Hilary
• Holly Holland

• J.J. Boggs
• J.R. Ticklepenny
• James's second cousin

• Maulana Karenga
• Kaylie's uncle
• Kennedy
• Jack Kirby

• Laser Nostrils
• Laura Somebody
• 
  Lefty McGee
• Lena
• Lexi
• Lucas Hanson

• Mable
• Magnopus
• 
  Martin Luther King Jr.
• 
  Mary Moo Cow
• Matthew (sailor)
• Max
• Michelangelo
• Molly's grandmother
• 
  Mona Dorey
• Mr. Bagelman
• Mr. Clapword
• Mr. Datillo
• Mr. Fallon
• Mr. Morgan's father
• Mr. Scarborough
• Mr. Yuksel
• Mrs. Akyuz
• Mrs. Fallon
• Mrs. Fogal
• Mrs. Hammer
• Ms. Blank
• Ms. Lemon
• Muffy's grandmother

• Nadia Comeinimgladtomeetcha
• Neil Strongarm

• Pablo Neruda
• Pal's father
• Penny Papakostas
• Persephone
• Philomena Peckensniff
• Piccolo Pete
• Pierre (boy)
• Prunella's grandparents

• Quadroblast

• Rattles' father
• Jean Renoir
• Rob
• Rodentia Ratburn's child
• Ruthie

• Schuyler
• Shirley
• Silas
• Speedy (person)

• Tahmelapachme
• Thoreau
• Thunder MacDuff
• Tomas Greenberg
• Trixie Tibble
• Harry Truman

• Whitney

• Xenon

• 
  Yamada Taro