The Grim Adventures of Billy & Mandy

The Grim Adventures of Billy & Mandy is an American animated television series that originally aired as a segment series on August 10, 2001 along with Evil Con Carne in the Grim & Evil block. The show officially aired as a series on June 13, 2003 and ended on November 11, 2007 with the finale The Grim Adventures of the KND.

A film titled Underfist aired on October 12, 2008 and was originally intended to be the pilot of a planned spin-off to The Grim Adventures of Billy & Mandy, but due to Atoms contract expiring it was never made into a series.

Premise
The series is about a dimwitted boy named Billy and his cynical, merciless friend, Mandy, who befriend a Grim Reaper after he lost in a limbo contest.

Characters

 * Billy - A dimwitted but yet happy go lucky boy.
 * Mandy - A very grumpy girl who is also Billy's neighbor.
 * Grim - Also known as The Grim Reaper, who unfortunately became Billy and Mandy's best friend after losing at a limbo contest.
 * Irwin - Billy's closest friend, which also has a crush on Mandy.
 * Gladys - Billy's mom.
 * Harold - Billy's dad.
 * Jeff the Spider - A giant spider who thinks Billy is his dad.
 * Hoss Delgado - A 33 year old exterminator who wants to kill monsters.
 * Eris - A goddess of Discord and Chaos who can do spells with her magic apple.
 * Fred Fredburger - An elephant demon who likes Nachos and says "Yes" all the time.
 * Sperg - The local bully who has a sensitive side and only bullies Billy because he's different.
 * Pud'n - A fearless classmate of Billy who is pretty unlucky and he likes bunnies.
 * Mindy - A typical girl in a cartoony fashion who is Mandy's new rival and is the queen bee of Billy and Mandy's school.
 * Nergal
 * Nergal Jr.
 * General Skarr
 * Boogeyman
 * Dracula

Video Game
A video game based on the series was released in 2006 for Nintendo GameCube, Playstation 2, Nintendo Wii, and GameBoy Advance. The PS2 and GameCube versions were released on September 25th, the GameBoy Advance version was released on October 16th, and finally, the Wii version released on November 19th. The game's gameplay is inspired by the Power Stone video game series.

Billy and Mandy's Big Boogey Adventure
Originally premiered on March 30th, 2007, the movie revolves around Billy and Mandy helping Grim to get his job back.

Billy and Mandy: Wrath of the Spider Queen
Originally premiered on July 6th, 2007, the movie revolves the Spider Queen getting her revenge on Grim because she was supposed to be the Reaper

Underfist: Halloween Bash
Originally premiered of October 12th, 2008, the movie revolves Hoss Delgado, General Skarr, Fred FredBurger, Jeff the Spider, and Irwin teaming up with each other to defeat an evil army of chocolate bar monsters by an evil marshmallow bunny. The movie was meant to be the Pilot for a Billy and Mandy spin off series but never got off the ground when Maxwell Atoms expired his contract with Cartoon Network.

Rejected film pitch
In 2021, Maxwell Atoms pitched to Cartoon Network a new reboot film that would serve as the true series finale, titled Billy & Mandy Destroy Us All: A Cosmic Horror Musical. However, he then revealed in September that the network rejected the film becaused it felt the modern audience had no knowledge of the franchise, in spite of the series being avaliable on the HBO Max platform, excluding the fact that not the entirety of the franchise is avaliable there.

Home Media
The Complete First Season of The Grim Adventures of Billy and Mandy was released on DVD on September 18th, 2007.

All 6 seasons of the series are available on iTunes and Amazon Prime, with the exceptions of Billy and Mandy Save Christmas and Billy and Mandy's Big Boogey Adventure due to music licensing issues. The spinoff pilot Underfist: Halloween Bash is unavailable everywhere, as it was rarely seen after its broadcast in 2008.

The Grim Adventures of Billy and Mandy is available to watch on HBO Max since January 1st, 2021. However, the Christmas episode, Billy and Mandy Save Christmas and the two TV movies, Billy and Mandy's Big Boogey Adventure and Underfist: Halloween Bash, are completely missing from the service.

Appearances in other media
Mandy appeared in the Foster's Home for Imaginary Friends episode, The Big Picture.

In an episode of Ben 10, there was an alien character known as a Maxomatar whose design resembles Billy.

Billy and Mandy's names appeared on a list in the Steven Universe and Uncle Grandpa crossover episode, Say Uncle.

Billy made a cameo appearance in the Uncle Grandpa episode, Pizza Eve.

Grim had a cameo appearance in the OK K.O.! Let's Be Heroes episode, Crossover Nexus, where his two roles were to be one of the Cartoon Network heroes that were turned into stones by Strike and one of Ben 10's transformations to defeat Strike himself. He also had another cameo in the episode, Monster Party.

A Grim Adventures of Billy and Mandy skit was featured in an episode of the Adult Swim series, Robot Chicken.

Trivia

 * As of 2021, the series' third TV movie, Underfist: Halloween Bash, was never featured on home media, not being released on DVD, iTunes, or even on WarnerMedia's streaming service, HBO Max. It became a lost film as it was rarely seen after its broadcast in 2008.
 * However, the movie is available on HBO Max in Latin America.
 * The Christmas special Billy and Mandy Save Christmas and the TV movie Billy and Mandy's Big Boogey Adventure only survived on the DVDs from the 2000s due to their omissions from the streaming services following the music licensing issues, as well as no longer being aired in reruns.
 * However, Billy and Mandy's Big Boogey Adventure is at least available on HBO Max in Latin America.