The series centers on the exploits of the happy-go-lucky title character, who lives in Miseryville, a miserable town filled with monsters and demon-like creatures.

The final episode aired on July 15, 2011 in the United States, and April 5, 2012 in Canada, with reruns continuing until December 2017.

This is a challenge because Jimmy lives in Miseryville, the unhappiest town around, run by the megalomaniacal Lucius Heinous the Seventh.

Some of the key characters from the show are: According to Edward Kay, a 6-minute not-for-air demo was funded by one of the investors with the intention that the series would be a black comedy for an older youth audience.

Several characters from this initial pitch have similar appearances yet different, darker attributes from their finalized television counterparts.

"SpewTube": After Heloise posts an embarrassing video of Lucius, Jimmy helps him regain his reputation.

"The Competition": To get Heloise and Beezy to stop fighting, Jimmy organizes a contest where whichever of the two is nicest will get the last ticket to a popular concert.

"A Hair-Brained Idea": To look more handsome to Jez, Lucius switches his horns for Jimmy's hair, but both learn to their horror that the other's personality comes with it.

"Fused Together": Heloise gets revenge when Jimmy spends too much time with Beezy and shows up late to hang out with her.

"Air Force None": After Heloise builds a marvelous plane for Lucius, Jimmy sneaks on board with a dream to fly it.

"Hooded Chicken": Jimmy and Beezy start wondering what Heloise's feet look like, which drives her crazy.

"Generation Text": Jimmy and Beezy are using apps on their MiseryPhones which leads them, Heloise, and Lucius to be held captive by the Schwartzentiger.

"Going Green": The residents of Miseryville complain about the conditions of the city, so Lucius Heinous VII creates a "suggestion box" for everyone to put their ideas in.

Although it was simply made so Lucius wouldn't have to deal with everyone's problems, Jimmy sets out to actually improve Miseryville.

"Toast Busters": Jimmy begins being haunted by a ghost couple who originally lived in his house.

They need his help to retrieve a toaster they lent Lucius years ago, to travel back to Ghostville.

The show aired in Southeast Asia on Cartoon Network and Latin America on Nickelodeon starting in 2009.

[4] Common Sense Media described the series as "(a) jumbled stew of violent humor, overly arch wit, and broad jokes that may not be tough for kids to grasp (but may be too silly for grown-ups)", and said that it's best for teens and young adults who still have a juvenile sensibility.