With her dad away, Mavis is so ready for adventure -- if strict Aunt Lydia doesn't stop her first. Set four years before the "Hotel Transylvania"...

Mavis accidentally lures an unwelcome guest into the hotel.

Mavis finds her childhood toy, Demented Debbie, in the attic.

The monsters celebrate Bad Friday by trying to win the Screamie for the best scare.

Mavis gives Hank the gift of basketball.

While doing her chores around the hotel, Mavis mistakes truth bugs for bed bugs.

Mavis invites Lydia's high school rival to the hotel.

The kids get trapped in a human house.

Mavis' cousin shows up and challenges her to a game of phlegm ball.

Mavis accidentally turns Wendy into a ginormous, blobby version of her little self.

Mavis' teen crush, Jett Black, visits the hotel.

Mavis tries to prove she can care for a living creature by rescuing a "bad egg".

The kids try to watch the last episode of their favorite show, Hotel Pennsylvania.

Mavis wins employee of the month and the right to share breakfast with Aunt Lydia.

Dr. Gillman saves Wendy's ponytail and now she's indebted to him.

Hank has to pretend to be his dad as he films his new action flick.

Mavis and Wendy set up Aunt Lydia and Bob Blob on a date.

Pedro desperately tries to throw a curse.

Mavis loses a casket with Aunt Lydia resting inside.

Aunt Lydia's favorite author is coming to the hotel, but the kids cleaned the room so fast they accidentally got rid of the real ghost writer.

The kids clean a room so fast they accidentally get rid of a ghost writer.

Mavis accidentally destroys Pedro's mummy wraps.

Mavis is driven mad thinking she's morphing into her cousin Klaus.

Aunt Lydia is accidentally turned into a teen.

Pedro's mom visits the hotel.

Mavis learns the true meaning of Halloween.

Mavis hosts a birthday party for Diane.

The hotel becomes infested with garlic.

Dracula receives an endorsement deal.

Hank learns his thumb is from a famous ancestor.

Hank swaps brains with Sir Isaac Newton, a zombie.

Medusa visits the hotel.

The needle on Lydia's record player is broken, and Klaus claims to know where on is if Mavis teaches him to bat out.

Dr. Gilman has to take a test to prove he's a real doctor.

Mavis wants Krampus to resolve a past mistake so everyone can enjoy Creepmas.

The Sandman puts the hotel under a spell.

Mavis and Uncle Gene go on one last road trip.

Mavis tries to make Quasimodo be nice.

Wendy applies for a spot on the hotel's aerial security team.

Mavis talks herself into throwing a fake funeral for Uncle Gene.

Mavis uses a cursed code to accidentally unleash a video game on the hotel.

Kitty gets sucked into the self-updating book on the history of monsters, which is on display at the hotel; Mavis must travel back in time to find...

Cornelius Shivers is writing a book about Hotel Transylvania.

When a priceless Dracula family heirloom is destroyed, the four kids are the prime suspects.

Pedro uses an amulet to be first in line at the buffet.

Pedro and Hank have not been getting along. Mavis and Wendy suggest they should get new roommates.

Mavis' werewolf pals from her old Ghoul Guide troop come to the hotel for a visit.

Frankenstein is casting for his new movie at Hotel Transylvania.

It's Mavis' Fangceanera and she's turning 115. Not only is it a party, but a vampire rite of passage as she finally earns her Dracula cape.