Billy & Mandy's Big Boogey Adventure

E1

A scene of Endsville two weeks into the future shows a dystopian world ruled by the "Lord of Horror", who wields the all-powerful artifact known as "Horror's Hand". At the same time, two robotic replicas of Billy and Mandy are sent into the past, to stop the real Billy and Mandy from interfering with the current events.orror's Hand to rule the world.

Billy & Mandy: Wrath of the Spider Queen

E2

On a rainy day, giant spiders appear in Billy and Mandy's school and start kidnapping the children one by one. Grim presumes this is somehow related to his past, but does not figure it out until he receives a message saying that Velma, the Spider Queen, an old good friend from high school, is responsible for it. Meanwhile, Billy meets with Jeff the Spider, who informs him that he is precisely marrying Velma. After trying to recover a talking carton of chocolate milk from Jeff, Billy and Jeff get into a fight, and Jeff looks angrier than ever before.

Underfist: Halloween Bash

E3

Billy, Irwin and Mandy go trick-or-treating on Halloween, and an evil marshmallow bunny attacks children with chocolate beasts.

The Grim Adventures of the Kids Next Door

E4

While Billy's Dad is underwear shopping, Billy wears his dad's lucky pants, and accidently rips them with Grim's scythe. He calls Ed, Edd n Eddy, and they recommend Kids Next Door for charity.

Super Myron Brothers

E5

Billy looks into Grim's trunk and sees a monster and names it Myron. But when Billy brings Myron outside to his backyard, he gets eaten.

Macaroni Man

E6

Billy's Dad forgot to buy Billy's present for his birthday again! Everytime Billy's Dad buys a present for Billy, he will get distracted by a "Rocket" Kiddie Ride. He found a way to give Billy a present that will be "The greatest gift ever, made by the hands of Man" Billy's Dad gave Billy a macaroni bike, but the macaroni Billy's Dad used are the ones supposed to be used for the macaroni salad. The short ends with everyone eating macaroni salad while Grim vomits upon learning the truth of the secret of the macaroni salad (Motor Oil).

Cake It to the Limit

E7

Grim decides to make a cake for Billy's birthday, but he and Mandy end up making a Devil's Food cake that comes alive and began wrecking the kitchen. The cake hops on Grim's face but Mandy smashes it and splatters it all over the kitchen. Grim and Mandy give Billy a cake covered kitchen, much to Billy's delight.

Makeover the Top

E8

Irwin finishes wrapping Billy's present and buys a huge present for Mandy as well. He decides it is not big enough so his dad decides to teach him how to dance. Irwin writes her a rap and Irwin's dad ends up teaching him how to work out instead of dancing. Irwin shows his moves to Mandy, but Mandy rejects him; Irwin also gets a wedgie from Sperg.

The Uninvited

E9

Dracula was heading for the bingo hall when he ran into Pud'n who was on his way to Billy's party. Dracula was insulted he was not invited to the party and decides to crash it. Harold will not let him in and accidentally calls him old. Dracula starts dancing and breaks all his bones, much to Harold's disgust. Harold lets him in so he will stop.

Death of the Party

E10

Billy blows out the candles off his cake and Dracula turns to leave, but Billy stops him and forces him to stay for games. They play Pictionary as he draws Abraham Lincoln but no one guesses it. Everyone turns to leave but Billy stops him and forces them to party all night. Billy decides to get a pinata but the stores are closed so Billy forces them to stay all night until Grim and the others decide to use Billy as a piñata.

Dream Date

E11

Irwin has a dream sequence of taking Mandy out for the time of her life.

Dracula De Bergerac

E12

Dracula tries to help Irwin win over Mandy.

Hate in an Elevator

E13

Irwin's grandmother, Tanya, embarrasses Irwin in an elevator ride with Mandy.

Future Nerd

E14

Irwin's future grandchild travels back in time to motivate modern-day Irwin to give Mandy a box of chocolates, but bully Sperg stands in the way.

Date With Death

E15

Grim and Dracula go on a double date.

Irwin Live

E16

Irwin tries to win over Mandy.

Fit to be Tied

E17

Grim has difficulty teaching Billy how to tie his shoes.

Dentally Disturbed

E18

Irwin wants to take Mandy out to dinner, and schemes to get money from the tooth fairy to pay for it.

Room Gloom

E19

Billy battles his messy room.

Senior Power

E20

Dracula participates in his senior home's self-defense course by role-playing as a "victim."

Frozey the Snowman

E21

Billy builds a snowman that comes to life.

Matinee Mandy

E22

Irwin wants to impress Mandy and goes to Grim for help.

Wish Unfulfillment

E23

When the gang frees Thromnambular, the wish-granting skull, from a lamp, Grim and Mandy bicker over who gets to make the first wish.

Meet the Reaper

E24

When the Grim Reaper tries to take Billy's pet hamster, Mandy and Billy make a deal to save his life. So the Grim Reaper challenges the kids to a limbo competition.