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Underfist: Halloween Bash
Underfist Title Card
Series Underfist
Season Special / Pilot Episode
Writer Maxwell Atoms
Broadcast information
Cartoon Network US Premiere October 12, 2008
Chronological information
Previous
Billy & Mandy Moon the Moon (production order)
Heartburn (air order)
Next
Underfist Versus the Dinosaurs

Underfist: Halloween Bash (shortened to Underfist and advertised as Billy & Mandy: Underfist) is a spin-off special of Grim & Evil. It aired on October 12, 2008. The special was going to be a setup for a new series, but Maxwell Atoms’ contract with Cartoon Network had expired before the series could be greenlit, so the special ended up as the series finale.

Synopsis[]

On Halloween night, Irwin, Billy, Mandy, and Grim... who's being used as the bowl, are trick-or-treating at Dracula's house. Billy is a spooky witch, Mandy is with the spanish inquisition (they burn witches), and Irwin is dracula, however Dracula tells Irwin of all the ways he's isn't dracula, being that: Dracula ain't no nerd, Dracula ain't no dummy, Dracula hasn't worn such a drab color like that since 1982, and that Dracula's a playa, who doesn't chase one angry woman his whole life... which is then immediately contradicted by his angry wife ordering him to go rub her feet.

Dracula then gives the kids some pennies and everyone but Irwin decides to just go home, Irwin tries to stop Mandy from leaving by talking about how they'll soon be adults who won't get to do these kinds of things anymore. The speech moves Grim to tears, though Mandy is unimpressed and threatens him by adding on how the spanish inquisition also burns vampires, so Irwin decides to trick-or-treat alone.

Irwin first goes to Hoss' trailer, though Hoss first thinks he's an actual vampire due to his costume and almost stabs him with a stake! Irwin fearfully points out to him that it's Halloween, to which he goes back to his trailer not entirely convinced, saying that he's got his eye on him...

Irwin is then weirded out by Jeff and Fred Fredburger trying to make blue webs out of candy, and lastly he tries going to Skarr's house, only to get angrilly yelled at by the general due to him accidentally stepping on his prize-winning purple pansies.

Mindy pranks Irwin into opening an Underworld portal releasing an army of evil candy warriors and Mr. Bun Bun, where they start terrorizing the neighborhood. Though Hoss soon comes in and starts absolutely decimating the candy army, tearing through it's chocolate troops like butter, however they manage to weaken him by shooting grape soda, sending him straight to Skarr's yard.

Now that his pansies have been further ruined by getting drenched in soda, Skarr comes out of his garage with a robot, joining in on the battle. Soon it's an all out war, with no mercy, no rules, no nothing. Mindy again pranks Irwin, but this time, pretending she is being kidnapped by Bun Bun, taking her into the Underworld. When the candy level gets too high, Hoss clicks his car unlock system, which a giant saw car (spoof of the Gotengo from Godzilla: Final Wars) comes drilling out of the ground. They escape and start to plot their attack to the Underworld.

Soon they find a portal to the Underworld in the rain, which Hoss and Irwin jump in first (because he does not trust monsters and says to Skarr that he doesn't trust one eyed weirdos), but the portal turns off, because it is controlled by a diamond, which Mindy (in her witch girl form) smashes. The candy warriors try to sacrifice Hoss, by pushing him into hot coco, but they want to leave Irwin alive. This is because he has the powers of a mummy, which they need to keep the balance of the Underworld in place, and to become stronger warriors to eat the trick-or-treaters.

Mindy creates a potion which turns all the warriors into candy monsters, and all she needs now is Irwin's powers to create the candy warriors ultimate monster form. But Irwin refuses.

Soon Jeff, Fred, and Skarr find out a way how to get to the Underworld by using Hoss's car to drill into the Underworld, and they rescue Irwin and Hoss.

Halloween-underfist

The Underfist Team

But the army of candy monsters hasn't given up yet. They head to the city and attack. Irwin and Hoss get into an argument, leading into a battle, turning on each other. While the battle is going on, the monsters suck up Irwin's powers (but not all of it) and transform into one giant candy monster. Jeff and Fred try to escape, but they fail. Soon Hoss and Irwin see the monster and start to fight it, beating it. Irwin discovers that Hoss is scared of monsters, because he was haunted as a kid. In a rare moment of emotion for himself (and the franchise itself), Hoss apologizes to Irwin for how he treated him and realizes there are good monsters out there. Mindy also realizes what she did was wrong and apologizes as well. 

Just then, Bunn-Bunn shows up. and he admits that he was the one who transformed Mindy into a witch girl. and he used her to get to Irwin. so he could use his true powers to open the portals to the Underworld. he also reveals that he was the one who cut Fred's tusks off, made Billy terrified of creepy crawling insects. especially spiders. and he also haunted Hoss's childhood years. and just as Bunn-Bunn's about to kill Mindy and Underfist, General Skarr kicks him into Swiss chocolate cocoa, melting him away to death. and saving the globe and Halloween night.

Grim, Billy, and Mandy award Underfist for saving Halloween, but then they hear something outside and investigate. It's soon revealed that there is an army of squid warriors who have found their way to the surface world that the team made while trying to escape from the Underworld.

Final Appearance of Characters[]

Major[]

Minor[]

Gallery[]

Click here to view more images from Underfist: Halloween Bash.
The image gallery for Underfist: Halloween Bash may be viewed here.

Continuity/animation errors[]

  • When Hoss comes out of his trailer, he punches Perkins's face off, but later Perkins is fine.
  • Hoss is stated to be 48 instead of 33. Although it could be due to a time skip between Grim Adventures and Underfist, it's unlikely as no one else has aged, or Hoss possibly lied about his true age.
  • Hoss claims to have gone into depression due to his breakup with Eris, even though that wasn’t the case in the episodes after they broke up.

Trivia[]

  • Chowder makes a cameo on a Halloween float.
Wishbones Skull Cameo
  • Thromnambular makes a cameo in Grim's lab but with 13 wishes on his forehead, instead of 9.
  • This is technically the series finale for The Grim Adventures of Billy & Mandy.
    • This special was also the pilot for the planned Underfist series, but due to Maxwell Atoms' contract with Cartoon Network ended around the time of the special's premiere, as well as Cartoon Network wanting more live action shows than animated shows at the time, the plans for the rest of the series was cancelled.
  • Fred was redesigned to a peanut shape. He is more green and smaller.
  • There were supposed to be more sequels shown at the ending credits of Underfist: Halloween Bash. The sequels in order are "Underfist Vs. the Dinosaurs", "Underfist Against the Astro-Vampires", "Underfist: Easter Beatdown", "Underfist: Return of the Spider Queen", "Underfist: Action Squad Miami", "Underfist Teaches Traffic Safety", and "Underfist Babies". However, none have ever been produced.
    • Maxwell Atoms has stated that some of the sequels were simply jokes, but that at least the first two were actually planned.
  • General Skarr seems to show signs of aging, as he now has a beard, mustache, and his military clothes are absent in the film (he's either in his underwear or in his Underfist uniform).
    • Additionally, Hoss has also aged: he has grey streaks in his hair, he's put on weight, and it's confirmed that he's 48 years old in the movie (as opposed to being in his thirties in the series). He also lost his right leg and replaced it with a chainsaw, similarly to his right hand.
    • Despite this, Irwin, Billy, and Mandy don’t appear to have aged at all.
  • During the opening sequence narrated by Grim, clips from previous Billy & Mandy episodes are used as follows: the Billy & Mandy main title sequence, "Be A-Fred, Be Very A-Fred", "Wrath of the Spider Queen", "Guess What's Coming to Dinner", "Wishbones", "That's My Mummy", "Irwin Gets a Clue", "Home of the Ancients", "King Tooten Pooten", "Dracula Must Die!", "Billy & Mandy's Jacked Up Halloween", and "Billy & Mandy's Big Boogey Adventure".
  • When the special originally premiered, it was aired in 16:9. However, all future reruns and rereleases had it cropped to 4:3.
  • Baron Von Ghoulish, from the episode "Billy and Mandy Save Christmas", makes a brief cameo in the film. He is seen being scared by Trick-or-Treaters in costumes, and falls back into his coffin.
  • Jeff makes two references to Maxwell Atoms when says, “Soon [he] will be thirty eight” and “[He] will get a job [he] hates.”
  • We learn how Hoss lost his hand, leg, and eye; he explains the he was running with scissors, despite what his mother told him.
  • The lab coat Billy wears while on his "B" alter-ego look similar to Dexter's clothes from Dexter's Laboratory.
  • Fred Fredburger is the only Underfist member that didn't debut in the Grim & Evil era.
  • The characters who make up Underfist are all side characters who started gaining popularity after appearing in the series (sometimes called "Ensemble Darkhorses"). This is most likely why they were chosen as the main characters and Grim, Billy, Mandy, and Mindy are secondary characters this time.
    • Irwin was, arguably, the most popular of these characters, as he started gaining larger roles as the series progressed. This is probably why he is the main protagonist. 
  • According to Maxwell Atoms, he initially approached online artist Vinson "Bleedman" Ngo, known for creating a fan-comic inspired by Billy & Mandy entitled Grim Tales, for character design work on the special, but he declined due to commitments with his own work.[1]
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