Characters who have appeared only once.
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All items (169)
A
B
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- Bat-Webbed Booger Being
- Bath Foam
- Bed Cover Monster
- Binky Betsy
- Black-and-White Drawing of Calvin
- Bloatoid
- Blob of gelatinous muck
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- Boogeyman
- Box Office Cashier
- Bug Being
- Bug-like carcass
C
- Calvin as a Doctor
- Calvin as a Helmeted Super Hero
- Calvin as an Astronaut
- Calvin as Susie's Husband
- Calvin Controllers
- Calvin in 2-D Form
- Calvin in Black-and-White Form
- Calvin in Chemically Induced Invisible Form
- Calvin in Dog Form
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- Calvin in Film Negative Form
- Calvin in Fire Form
- Calvin in Frankenstein Monster Form
- Calvin in Inch-Tall Form
- Calvin in Mutant Fly Form
- Calvin in Notebook Paper Form
- Calvin in Plane Form
- Calvin in Quarter-Inch Form
- Calvin in Slinky Form
- Calvin in Superhero Form
- Calvin in Swollen Form
- Calvin in Tiger Form
- Calvin in Tiger Form (Transmogrifier alter ego)
- Calvin in Twofold Insect-Sized Form
- Calvin in Unexplained Giant Form
- Calvin in Unexplained Invisible Form
- Calvin in Werewolf Form
- Calvin in Whaler Form
- Calvin of the Future
- Calvin the Ant
- Calvin the Bold
- Calvin the C-Bomb
- Calvin the Criminal
- Calvin the Elephant
- Calvin the Flea
- Calvin the God
- Calvin the Human Light Particle
- Calvin the Human Satellite
- Calvin the Hummingbird
- Calvin the Lightning Bolt
- Calvin the Reptile
- Calvin the Zombie
- Calvin with Life of Pizzazz
- Calvin's Good Side
- Calvin's grandfather
- Calvin's grandmother
- Calvin's parents friend
- Calvin's Skeleton
- Calvin's Stomach Microbes
- Calvin's uncle
- Calvin's Unethicated Duplicates
- Candace
- Captain Napalm (Alter ego)
- Chameleon
- Charlie (barber)
- Chicken (Transmogrifier Gun alter ego)
- Claire
- Communicating Alien
- Conversing aliens
- Crab Teacher
- Crocodile
D
E
F
- Farmer Brown
- Filthy Rich
- Firefighters
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- Florist
- Flower (Transmogrifier Gun alter ego)
- Frank
- Fred
- Frog
- Frog (Transmogrifier alter ego)
G
H
J
L
M
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- Maggot-Man
- Mammoth
- Maurice
- Megalon
- Miss Wormwood in Plesiosaur Form
- Moe's friend
- Monster (Alter ego)
- Motherly alien
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- Mr. Kneecapper
- Mrs. Carroll
- Mrs. Derkins
- Mt. Calvin
N
O
P
R
S
- Saber Tooth Hobbes
- Safari Al
- Safe (Transmogrifier Gun alter ego)
- Scavenger Mordon
- School Alter Egos
- Shark
- Slug
- Snow Goons
- Song Sparrow
- Susie as President of the United States
- Susie in Adult Form as a Patient
T
- The Bog Monster
- The Incredibly Annoying Human Echo
- The Man in the Moon
- The World's Most Powerful Computer
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- Tommy Chesnutt
- Tornado
U
W
X
Y
Z
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