He is often forced to do their chores and create supernatural fun for them. Even though he has brutal strength, Sperg is scared of Mandy because she's stronger than him.
In a few early episodes however, Claire is seen giving orders to Mandy whenever the house gets dirty and in Keeper Of The Reaper is seen trying to love Mandy after she was born and admits that she and her husband love Mandy very much. He appears here and there, as well in the theme song along with Milkshakes and Mr. Snuggles, even though Mandy is disgusted and annoyed with him, she does care about him. At one point, Jeff rejects Billy when he refuses to love his "son", but it just turns out the spider was possessed by a cow-spider demon. In consequence, people call him "he-who-should-never-ever-be-named".
The series, which originally aired on Cartoon Network from June 13, 2003 to October 12, 2008, follows two children, a dimwitted boy named Billy (voiced by Richard Steven Horvitz) and a remorseless girl named Mandy (voiced by Grey DeLisle). In his first appearances he distrusts Grim, but this dissipates as the series progresses. https://gaobam.fandom.com/wiki/Sperg?oldid=4026.
Sperg is an 11-year-old boy whose preferred method of terrorizing nerds is by administering his "lethal" wedgies. With Mandy's help, he finally manages to scare Billy into loving him.
Hoss is a 33-year-old spectral exterminator; a hunter of paranormal creatures. Voiced by Jess Harnell and Richard Horvitz. He makes his first appearance in "Toadblatt's School of Sorcery". Fred Fredburger is a dimwitted, pale green, bipedal furry otherworldly creature resembling an elephant with stubby horns and the tail of a devil.
Throughout the series, Mandy rarely smiles, and her facial expression remains perpetually disgruntled.
Mandy's pet dog. Comments: 14 Kudos: 37
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Hoss is known to make incredibly odd and usually completely irrelevant metaphors, often when talking to someone who is either cowardly or stupid.
Fierce the Deathless (Brother). He then shows his more sinister side when enslaving all of the people of Endsville and zombifying them.
In one episode Hector and Ghastly reteam with Skarr who agrees to help them, but goes crazy when they destroy his garden and show no respect for it. Grim was born around 137,000 years ago at the time of the Stone Age and speaks with a Jamaican accent. Because of all of the stress caused by Billy, Harold, Grim and, to a lesser extent, Mandy, Gladys is the only character in the series to demonstrate having more control over herself when Mandy uses her own strong willpower. Principal Goodvibes is the Paul Lynde-esqe principal of Billy and Mandy's school. Despite his physical strength, he is frightened of Mandy because of her toughness and cynical attitude. It is revealed in the episode "Son of Nergal" that his true form resembled a hideous black octopus-like creature, which is rather blobbish in shape.
The name of Sperg, the school bully, later became derogatory internet slang for people with autism or Asperger's. However, Sperg is afraid of Mandy due to her cynical attitude. The toxins that Jeff's fangs produce help to turn Mandy back into her old-self. A minor character, Milkshakes is Billy's endearing pink pet cat. Mandy is thoroughly emotionless; however, has sometimes been touched in a few scenarios, such as at one point when Billy was thought to be dead and Mandy's reaction appeared quite nervous and partially mournful. Mandy smiling is shown to be the end of the world; in the episode "My Fair Mandy", after entering a local beauty contest against the queen bee of her classroom, it was revealed that all of reality would be humorously, psychedelically distorted, resulting in the series swapping premises with that of The Powerpuff Girls, another Cartoon Network animated series.
Albeit she seems to support her overindulged and snobby daughter, Mindy was seen tearfully lamenting in one episode that her mother did not love her, but her reasons for feeling this way are unknown.
He appears to be on good terms with Mandy, being one of the few authority figures that she does not directly disrespect. She has a severe facial tic, which usually appears when Billy is misbehaving, when her authority is challenged, or whenever Grim is present, and has also developed nervous breakdowns. He, in "Keeper", paternally allowed both Billy and Mandy have Grim on the condition that Billy doesn't leave his house for one week. Unlike Mandy and Billy, who show no signs of fear for the frightening, supernatural and magical beings and settings around them when using Grim's magic to venture into the underworld (Mandy because of her fearless, sinister and smart personality and Billy because of his ignorance), Irwin has displayed more signs of cowardice in such situations and seems to be more easily terrified than his friends when he accompanies them on such trips (such as in Big Boogey Adventure and Keeper of the Reaper). William "Billy" is the overall deuteragonist of The Grim Adventures of Billy and Mandy.
Harold is also known to be afraid of Santa Claus. He and the whole Underworld Court first appeared briefly in the episode "Home of the Ancients", but had a greater role in the episode "Keeper of the Reaper". In one episode, it was revealed that Irwin's mother is a mummy (as is his maternal grandfather) and that his paternal grandfather is the bloodthirsty Dracula, who is married to Irwin's saucy paternal grandmother Tanya.
Wanda soon shows Sperg that in order to get rid of the zits, he must get the bones … When it hatches, Jeff appears and believes Billy is his father.
Gallery Comments by consumercollectibles consumercollectibles Tom Kenny was asked for the role of Billy, but he declined. Grim used to have a crush on her during earlier episodes, but later changes his mind, claiming her to be a "psychopath." She even has a tattoo on her left elbow that says "Son," just like Sperg, who has the word "Mom" on his left elbow.She first appeared in "Ecto Cooler.