The Grim Adventures of Billy & Mandy[c] is an American animated television series created by Maxwell Atoms for Cartoon Network.

Grim, who is reluctant to serve the two children, has access to supernatural items, spells, and other abilities that often lead Billy and Mandy to interact with otherworldly environments, characters, or situations.

The series is centered around the exploits of Billy (Richard Steven Horvitz), an idiotic and happy-go-lucky boy; Mandy (Grey DeLisle), a deadpan, cynical and cold-hearted girl; and Grim (Greg Eagles), a Jamaican-accented Reaper.

The duo also use Grim's enormously strong supernatural abilities or ties with a number of beastly characters to achieve goals or desires for themselves, often with twisted results.

The series had its genesis in 1995, when Maxwell Atoms, while he was a junior at the University of the Arts in Philadelphia, made a two-minute short film for his thesis project.

Among the ideas he presented to Hanna-Barbera was "Milkman", centering on an anthropomorphic, superhero milk carton who saves the missing children depicted on his back.

[3] The show was put into full production after the result of a viewer poll event by way of telephone and the Internet called Cartoon Network's Big Pick which was held from June 16 to August 25, 2000.

Atoms opted to continue Billy & Mandy and accepted the network's decision, as he considered running both shows stressful.

[6] Another episode shows Ghastly, Hector, Boskov, and Stomach restarting their evil organization and convincing Skarr to rejoin them.

[7] On March 20, 2022, Craig McCracken revealed that years ago Cartoon Network had plans for a spinoff series titled Cheeseburger featuring Fred Fredburger and Cheese from Foster's Home for Imaginary Friends, but the idea never gained traction.

He likened Mandy to "the cold, rational way [he] learned to view the world in order to survive", Billy to "the fun and joyous inner-world where [Atoms likes] to spend [his] time" and Grim to "the moral mediator between the two.

[10] Common Sense Media gave the show a 3/5 star rating and stated that it has "goofy punchlines and obscure cultural references" and recommends the viewer age be at least 8 years old.

[11] Entertainment Weekly ranked The Grim Adventures of Billy & Mandy number nine on its list of "10 Best Cartoon Network Shows" in 2012.

The first, a 3D fighting game, was developed by High Voltage Studios and released in North America on September 25, 2006, for the PlayStation 2 and GameCube, and on November 19, 2006, for the Wii as a launch title.