Many of the characters possess pets that have some connection to their nature, personality and/or family history. Generally the pets stay home while their owners are at school, although Lagoona Blue's pet and Operetta's pet accompany them at school.
Official pets
Watzit
Frankie Stein's pet puppy. Like her master, she has been stitched together from the best parts of several other household pets. Watzit's bed was briefly seen in "New Ghoul @ School" but he was not seen sleeping inside.
Count Fabulous
Draculaura's pet bat. He has a fondness for insects, which is a good thing considering Draculaura's vegetable garden attracts hundreds of them. He is usually earing a pink heart sweater and bow which his mistress thinks is cute.
Read Count Fabulous's full profile.
Crescent
Clawdeen Wolf's pet is a cute and furry little kitten. She has purple fur and a cresent on her head.
Neptuna
Lagoona Blue's pet piranha who is normally quite friendly despite her species. Lagoona carries her around in a special water bubble purse.
Hissette
A cute little cobra with a not-so-cute bite. Hissette was an accidental stowaway in a gift from Egypt to Cleo de Nile and was swiftly adopted by the princess. She is normally dressed in gold bangles.
Sir Hoots A Lot
Ghoulia Yelps's powder blue owl.
Read Sir Hoots A Lot's full profile.
Crossfade
Holt Hyde's pet is a yellow and orange chameleon. He seems to enjoy music and accompanies his owner on night time strolls when they first move and get to know the place. Being the same person, Jackson Jekyll also owns Crossfade, but when with him Crossfade is green and yellow.
Read Crossfade's full profile.
Perseus
A two-tailed black and orange rat owned by Deuce Gorgon. Deuce's mother was never pleased that her son named him after her enemy, and she once threatened to turn the rat into a paperweight if he kept raiding the kitchen for cheese.
Rhuen
A ghost ferret owned by Spectra Vondergeist.
Rockseena
A gargoyle bulldog owned by Clawd Wolf.
Read Rockseena's full profile.
Shiver
Abbey Bominable's pet wooly mammoth.
Azura
Nefera de Nile's pet scarab.
Sweet Fangs
Toralei Stripe's pet sabre-tooth tiger cub.
Read Sweet Fangs's full profile.
Memphis "Daddy O" Longlegs
Operetta's pet spider. So far he's the only pet of a Monster High student to actually make an appearance in the webisodes.
Read Memphis "Daddy O" Longlegs's full profile.
Cushion
Cushion is Howleen's pet hedgehog with a mowhawk.
Roux
Roux is a gargoyle griffin owned by Rochelle Goyle.
Chewlian
Chewlian is a venus flytrap owned by Venus McFlytrap.
Captain Penny
Captain Penny is a robotic penguin owned by Robecca Steam
Additional pets
The Glitterati rats
The Glitterati Rats are five lab rats owned by Frankie Stein, who wear a "coat" of glitter. They were introduced in the Monster High books and later seen in "New Ghoul @ School".
Smokey
Smokey is Deuce Gorgon's pet dragon from when he was a little boy. Smokey was the first pet he had. While playing one day, Deuce accidentally petrified Smokey and because he had little control over his powers back then, the spell didn't wane after 24 hours. Smokey has been a statue for many years while Deuce waits, heart-broken but patient, until the day he can be reunited with Smokey.
Nightmare
Nightmare is the fire-breathing horse of Headless Headmistress Bloodgood, functioning both as a pet and an assistant. Nightmare is a neurotic wreck of a horse, but intensely loyal to her owner and appreciative of kind gestures.
Frogs
The frogs are Lagoona Blue's pets at school since the day she saved them from dissection. Their numbers are legion and they eagerly help Lagoona whenever she asks them for it.
Notes
- C.A. Cupid is known not to have a pet.
- Purrsephone and Meowlody previously had a pet canary, but one of them became allergic and so they had to part with him.