Voiced by: David Kaye, Roger Jackson, Robin Atkin Downes, J.G. Quintel
Debuted in: Season 1, "Free Cake"
Supernatural beings resembling giant, floating babies. Responsible for granting Skips his immortality. They also enjoy cake.
- Absurdly Powerful Student Council: They were this in high school. And they were also the glee club.
- Babies Make Everything Better: Unless you anger one of them.
- Big Damn Heroes: They arrived to help the park workers in "Exit 9B".
- The Comically Serious: A lot of the humor comes with the juxtaposition of their deep voice and heavenly positions while still being giant babies and the moments they have with that.
- Deal with the Devil: Though more benign than most examples, they still have harsh consequences if Skips fails to do a ritual every year on his birthday.
- Everyone Went to School Together: In "Skips' Story", he attended high school with Skips, Gary, and Klorgbane during the 18th century.
- Eyes Always Shut: Sometimes.
- Good Is Not Nice: They are firmly on the side of good, but can be difficult to deal with.
- Infant Immortality: Averted big time in "Fists of Justice" when one of them has a mace shot through his chest and dies.
- Killed Off for Real: There used to be five of them, but one of them was killed in "Fists of Justice".
- Manchild: While they do act mature, they're still babies at the end.
- No Name Given: The only named Guardians are Archibald, who dies about 5 seconds after we hear it, and Reginald.
- Averted in "Skips Story" but only in the credits, the rest of them are Oswald, Boswald, and Griswold.
- Power Floats: They all float, likely due to them being magical creatures.
- Really 700 Years Old: They encountered Skips at some point and made him immortal and they have him fight their evil brother every 157 years.
- Sweet Tooth: They love cake. It's what saves Skips from being aged to dust.
Voiced by: Robin Atkin Downes
Debuted in: Season 1, "Free Cake"
The mysterious chauffeur for the Guardians of Youth.
- Absurdly Powerful Student Council: He was a member of the student counsel with the Guardians of Eternal Youth during high school.
- Big Damn Heroes: He arrived to help the park workers in his car in "Exit 9B".
- Cool Car: His flying El Camino.
- Everyone Went to School Together: In "Skips' Story", he attended high school with Skips, the Guardians of Eternal Youth, and Klorgbane during the 18th century.
- Expy: Word of God says he's based off of David Bowie.
- Punch-Clock Villain: Whenever he's seen on the opposite side of the heroes, he's stated he's just doing his job. Further proven when he represents Mordecai and Rigby in Cool Court, and is clearly trying his best to help them.
- Wingding Eyes: His eyes are golden stars.
Voiced by: Julian Holloway
Debuted in: Season 2, "Over the Top"
An undead soul collector and Skips' arch nemesis.
- Affably Evil: He genuinely cares about his family, always follows his word, and you kinda get the idea he's enjoying himself while playing these various games against Skips.
- Anti-Hero: He helped the gang defeat Garrett Bobby Ferguson, Jr. and his henchmen in "Exit 9B".
- Badass Biker: Death rides a supernatural motorcycle, and is definitely a badass.
- Big Damn Heroes: He arrived to help the park workers in "Exit 9B".
- Chess with Death: Whenever he appears, he's willing to let mortals keep their souls if they beat him at a contest/game, or do favors for him. Examples include arm wrestling, bowling, hot dog eating, and babysitting his son Thomas.
- The Devil Is a Loser: Death never wins at anything. He lost to Skips' arm-wrestling in "Over the Top", he got beaten by the Park Strikers in "Skips Strikes", and he got himself disqualified for vomiting during a hot dog eating contest in "Last Meal".
- Did You Just Scam Cthulhu?: Skips was able to beat Death at arm-wrestling by cheating with a strength-empowering toy. Although Death doesn't really call him out for it.
- Enemy Mine: He is temporarily counted among the park crew's allies in "Exit 9B". Of course, he may have just been doing his job; Exit 9B was built to let all of the show's dead villains out of the underworld.
- Even Evil Has Loved Ones: Has a wife and son he seems to actually love.
- Even Evil Has Standards: He may be the grim reaper, but even he was disgusted by Muscle Man and Starla making out in "Last Meal".
- Evil Brit: He resembles British rocker Lemmy and is voiced by British voice actor Julian Holloway.
- Final Boss: Of Cartoon Network Battle Crashers
- Friendly Enemy: Sometimes. Even though he's usually an antagonist, he teamed up with the park crew in "Exit 9B". He also helps Muscle Man propose to Starla by getting him his aunt's ring from the underworld in "The End of Muscle Man".
- Go-Karting with Bowser: He often ends up playing various games with the main characters (usually Skips), such as an arm-wrestling match or playing him in a bowling tournament. Granted, your soul is on the line in these matches, but still, it's the principle of the thing. The only contest he enters without putting anything in line was the pie-baking contest.
- Henpecked Husband: Has a wife and seems to genuinely love her, although he is rather submissive to her.
- Hidden Depths: He's very knowledgeable on rock music and its lifestyle when he helps Mordecai, Rigby, and Benson get into the Rock & Roll Underworld. It doesn't help that he's based off a rock musician.
- I Gave My Word: Thus far, he's always kept his word when he's made a deal with a mortal.
- Lean and Mean: Except for his disproportionately muscular right arm, which his leather jacket conceals well.
- Lethal Chef: Mordecai and Rigby agree that the pie he entered for the contest was awful.
- No Celebrities Were Harmed: His appearance is based on Lemmy from Motorhead.
- The Noseless: Justified, as it decayed off a long time ago.
- Parental Obliviousness: He and his wife have no idea that Thomas can talk and his true age. They don't even question why he was under a chandelier when it dropped on him.
- Punch-Clock Villain: Although he may enjoy taking souls a little too much.
- Sinister Scythe: He wields one, as is typical for most depictions of Death.
Voiced by: Carl Weathers
Debuted in: Season 3, "Slam Dunk"
The god of Basketball who can also coach people on how to play basketball.
- Berserk Button: Don't you dare bad-mouth basketball.
- Big Damn Heroes: He arrived to help the park workers in "Exit 9B". He comes back again in "Bank Shot" to tell Rigby that his "double or nothing" shot from early in the episode was still in play.
- Cool Car: He drives a custom designed white flying Cadillac Escalade.
- Gentle Giant: Justified since he's a basketball player.
- God Is Good: He is willing to train Mordecai and Rigby to play basketball even after Mordecai bad-mouthed basketball. He plays fairly when he has to sub for High Five Ghost and gives Muscle Man basketball powers. In "Bank Shots", he informs Rigby that his "double or nothing" shot was still in play.
- Graceful Loser: Even thought he lost to Mordecai and Rigby, he's still a good sport and congratulates them after the game.
- Half-Human Hybrid: He has the body of a human but has a basketball for a head.
- Hard Work Hardly Works: He tries to train Mordecai and Rigby to play basketball but they fail spectacularly. He gives up and just gives Mordecai and Rigby the power to play basketball.
- No Celebrities Were Harmed: He clearly resembles Kareem Abdul-Jabbar.
Voiced by: Steve Blum
Debuted in: Season 3, "Skips vs. Technology"
- Ambiguously Human: He looks humanoid but he has green skin and pointy ears.
- Artificial Limbs: During the American Revolution, he lost his arm and Skips replaces it with a wooden arms. Centuries later, he upgrades his arm to a robotic version.
- Big Damn Heroes: He arrived to help the park workers in "Exit 9B".
- Call-Back: His robo-arm is made by Yoshimoto Cybernetics, the same company that makes the Playco Arm Boy.
- Cool Car: He drives a DeLorean DMC-12 and has a car specifically for storm chasing.
- Cyberpunk: Has some shades of this.
- Holographic Terminal: He can summon these when he has to fix a computer.
- Katanas Are Just Better: Carries a katana with him.
- Meaningful Rename: His name was Samson, but once he became a technomancer he changes his name to Techmo.
- Mystical White Hair: While it does show his age, it also further shows that he's beyond the young man Skips once knew in the 18th century.
- No Shirt, Long Jacket: Part of his main attire is a long black coat with no shirt underneath.
- Older Than They Look: He seems to be immortal like Skips since he's been around since 1783.
Voiced by: Michael Dorn
Debuted in: Season 3, "Dead at Eight"
A demon who is the son of Death.
- Baby Talk: Thomas does this only when his parents are around to keep up the charade that he's still young.
- Caffeine Bullet Time: Cookies and sugar give him power.
- Creepy Child: Not surprisingly due to being the demonic son of Death.
- Enfant Terrible: He caused the deaths of three of his previous babysitters. Death was impressed to see Mordecai and Rigby alive.
- Evil Is Petty: Because of a simple insult, one he brought on himself no less, Thomas spends the whole time trying to ruin Mordecai's and CJ's relationship, nearly getting all three of them killed in the process.
- Jerkass: There's nothing nice about him.
- Laser-Guided Karma: When he gloats that he'll get his babysitter in trouble with his parents, something heavy drops on him which will knock him out cold.
- Large Ham: I WANT COOKIES! AND SUGAR! THEY GIVE ME STRENGTH!
- Psychopathic Man Child: Despite his age, he sometimes acts like an infant.
- Really 700 Years Old: Thomas is 300 years old.
Voiced by: Edward Asner
Debuted in: Season 4, "The Christmas Special"
- Badass Santa: Oh yes. Stops his head elf from creating a dangerous item from dark magic and when he goes behind his back to get it, Santa chases him down before crashing into the park and entrusting the gift for Mordecai and Rigby to dispose of.
- Big Fun: Somewhat averted. While a big guy, Santa is not fat at all and he is pretty grumpy throughout the episode. Justified, given the fact his head inventor made a supremely dangerous item and had to stop him. He loosens up a bit considerably when the job is done.
- Bulletproof Vest: How he survived getting shot by Quillgin. It also makes him look a bit rounder than he actually is, (especially with the sweater on.)
- Expecting Someone Taller: When Mordecai and Rigby first encounters him, they don't believe he's Santa due to his appearance not matching what everyone imagines. Santa says that TV producers made up his appearances.
- Hell-Bent for Leather: Wears a sweet leather longcoat over his holiday sweater.
- Heroic Build: Underneath his holiday sweater (and the bulletproof vest under his sweater), Santa is quite built.Muscle Man: Pa-rum-pa-pum-pum! Santas got a six pack.
Voiced by: Jeff Bennett
Debuted in: Season 3, "Eggscellent"
- 24-Hour Armor: He is never seen in any other attire.
- New Job as the Plot Demands: In "Eggscellent", he worked as somebody waiting for a winner of the Eggscellent Challenge, however because that only happens every 1,000 years, he spent the rest of his time in an old game store, however, in "Gamers Never Say Die", the game store flew away, along with his job, in Garage Door, he now works in the House Warehouse, and his final appearance in Ice Tape, he is the guardian of the fire VCR, the ice VCR, and the seemingly normal VCR.
Voiced by: Sam Marin
Debuted in: Season 2, "High Score"
A giant floating head with a beard held the universe record for an arcade game until Mordecai and Rigby beat his record.
- Back from the Dead: He, along with everybody who died due to Mordecai and Rigby's actions, came back in "Exit 9B".
- Big Bad: Of Season 2.
- Big "NO!": When Mordecai and Rigby beats his record.
- Do Not Call Me "Paul": People assumed that "GBF" meant "Giant Bearded Face" which it's not.
- Flying Face: But he can grow out his arms and legs.
- Fun with Acronyms: "GBF" does not stands for "Giant Bearded Face" or "Giant Beardo Face".
- Greater-Scope Villain: In "Exit 9B".
- Groin Attack: Receives one from Mordecai but since he's just a giant head with arms and legs, he reacts with "My Chin!"
- Jerkass: When Mordecai and Rigby are about to beat his high score, he lies about that it's all he has left, and how his wife left him, and then laughs at them when they give up and let him win, even bragging about how he never married.
- Wounded Gazelle Gambit: Did this to prevent Mordecai and Rigby from beating his record. It works but Mordecai and Rigby still beat his record at the end.
- Your Head A-Splode: After Mordecai and Rigby beats his record, his head exploded and his brain goo flew everywhere.
- Happens again in "Exit 9B" when Mordecai and Rigby stops his son's plan.
Voiced by: Roger Craig Smith
Debuted in: Season 4, "Exit 9B"
Garrett Bobby Ferguson's son.
- Avenging the Villain: He wants to resurrect his father. He succeeded temporarily.
- Bad Boss: He treats the brainwashed Benson and Thomas like slaves.
- Beard of Evil: The same beard type as his father and a huge asshole.
- Big Bad: Of "Exit 9B".
- Even Evil Has Loved Ones: He really loves his dad.
- Jerkass: He's rude to everyone that isn't his dad, especially Benson and Thomas.
- Knight of Cerebus: Even though it could be considered cartoonish, he manages to be one of the biggest threats to the park.
- Near-Villain Victory: Nearly wins, only to end up defeated along with his father and allies.
Debuted in: Season 3, "Fists Of Justice"
The evil brother of the Guardians of Eternal Youth. Only vulnerable to the Fists of Justice, he returns every 157 years to do battle with Skips.
- Awesome Mc Coolname: He has the name of a gladiator/conqueror.
- Ax-Crazy: He is a violent, sadistic being.
- Babies Make Everything Better: Averted due to being evil.
- The Bully: He was this in high school and nobody stood up to him due to being huge and immortal until Skips came along. Headmaster Bennett was unaware of his bullying until he saw his true colors during prom.
- Big Brother Bully: To the Guardians of Eternal Youth.
- Cain and Abel: Killed his brother Archibald and probably was going to do the same to the others.
- Carry a Big Stick: Wields a mace that also doubles as a epic flail.
- Dark Is Evil: Commonly seen wearing black. He's also one mean son-of-a-bitch.
- Knight of Cerebus: Especialy in his last appearance.
- Obviously Evil: Even back during his school days, it was pretty obvious he was destined for evil.
- Red and Black and Evil All Over: Decked out in a red and black cape.
Sung by: Sean Szeles
Debuted in: Season 2, "This Is My Jam"
When Rigby gets the song, "Summertime Loving, Loving in the Summer (Time)", stuck in his head and gets it out of his head, the song manifested itself into a physical form of a tape cassette and annoys everybody with its song.
- Animate Inanimate Object: Its a giant cassette tape.
- Back from the Dead: Its brought back to life in "Exit 9B".
- Cool Shades: Red ones.
- Department of Redundancy Department: The song "Summertime Loving, Loving in the Summer (Time)".
- Ear Worm: In-Universe.
- Intangibility: "You can't touch music, but music can touch you".
- Life of the Party: Subverted. It thinks that it's this, but it just annoys everyone.
- Start X to Stop X: The only way to defeat it was to play an even more cheesy, catchy, and repetitive song.
- The Thing That Would Not Leave: Ever since it escapes from Rigby's head, it would not stop playing its music and dancing. It eventually got on the nerves of the other park workers.
- Villain Decay: When it was brought back to life in "Exit 9B", it lost its intangibility and Mordecai easily kills it by it with a 2x4.
Voiced by: John Cygan (leader), Mark Hamill (Louie), & Dawn Lewis (duck)
Debuted in: Season 3, "Fuzzy Dice"
A group of living audio-animatronic that are criminals. The gang consist of two bears, one that resembles a bear and is also the leader and the other one that barely resembles a bear named Louie, and a female duck.
- A.I. Is a Crapshoot: Their aim is awful surprisingly.
- Bears Are Bad News: Two of the members are bears.
- Beware the Silly Ones: They may look like a joke, but they prove they're dangerous when they pull out real guns.
- Complexity Addiction: Their plan for revenge on the park workers is printing fake Amadeus dollars (coupons to buy steaks at "Steak Me Amadeus") and sell them to Pops who would give them to the rest of the workers. When they want more steaks, they would set up a meeting to exchange more Amadeus dollars and then ambush them. Their whole plan is dependent on the park worker's desire for steaks and apparently they didn't bother to take in account that if they use these counterfeit coupons they would get arrested and won't have the chance to meet them. Rigby lampshades it:Rigby: Dude, that's really weird.
Capicola Gang Leader: Well it worked didn't it?
- Even Evil Has Standards: When Margaret runs out crying after breaking up with Mordecai to attend her dream college, everybody, including the Capicola gang, ceasefire to allow her leave the restaurant. The leader even tries to talk her out of attending college, which results in him and his gang getting blown to bits by the restaurant owner.
- Eyepatch of Power: The female duck wears one in "Steak Me Amadeus".
- Family-Friendly Firearms: Averted, even though this is (ostensibly) a kids' show.
- Hostile Animatronics: These guys may look like ordinary animatronic mascots, but they're actually a murderous gang.
- Instrument of Murder: During the car chase, they threw a drum at them that was apparently a bomb.
- Jive Turkey: The female duck talks like this.
- No Name Given: Only one of them has their name revealed which is Louie the bear.
- Not Helping Your Case: When the leader tries to talk Margaret out of college, he tells her he didn't go to college and he turned out fine. Then the owner of the restaurant, Amadeus Martinez, proceeds to blow up the Capicola gang with a rocket launcher for talking down on college education.
- Not Quite Dead: They survived the events of "Fuzzy Dice" to seek revenge on the park workers.
- Revenge: They seek revenge on the park workers for foiling their plans on stealing the fuzzy dice filled with diamonds.
- Revolvers Are Just Better: The female duck uses one in "Steak Me Amadeus".
- Simpleton Voice: Louie the bear speaks in this tone.
- Two-Faced: The leader has the right side of his face exposes revealing his robotic face.
Voiced by: Fred Tatasciore
Debuted in: Season 4, "A Bunch of Full Grown Geese"
Four Canadian Geese who seek to claim the park as their territory by attacking anybody who gets in their way.
- All Your Powers Combined: When the four fuse.
- Arch-Enemy: They constantly state how they and the Baby Ducks are sworn enemies.
- Armored Villains, Unarmored Heroes: In the first part of the fight, but it's subverted when the ducks gain a Powered Armor.
- Attack of the 50-Foot Whatever: Like the baby ducks, they can also fuse together to be a giant four-headed goose man.
- Berserk Button: Using blankets or geese repellent on makes them angrier. Mordecai and especially Rigby learn that the hard way.
- The Dreaded: These geese are so terrifying that even Skips, who has no problems dealing with any dangerous situation, doesn't want to go near them.
- Evil Counterpart: To the Baby Ducks. They are also a group of four talking avian birds that can fuse into a strong and bigger version of themselves, but while the Baby Ducks are friendly birds, the Geese are noting but jerks.
- Evil Is Petty: They ruin Mordecai, Rigby, and Pop's sandwich by knocking the sandwich to the ground, kicking dust on it, throwing it in a trash can, beating up the trash can, and rolled that trash can towards Mordecai, Rigby, and Pops. After they temperory beat the baby ducks, they start to destroy everything Mordecai and Rigby cares about, and the first thing they destroy is their standard-defintion TV by blowing it up with missiles.Goose: Fools! The game of "Duck, Duck, Goose" will never end. There will be future lakes... future sandwiches to ruin...
- Evil Sounds Deep: When they start talking but after they were defeat one of them talks in a goofy voice.
- Excrement Statement: They poop all over the park lake to mark their territory.
- Fusion Dance: Can combine into a giant.
- Kick the Dog: When Pops tries to tell them to leave, they shove Pops around while they laugh as they make Pops cry. Pops locks himself inside his room crying after that moment.
- Psycho Rangers: To the baby ducks.
- Red Eyes, Take Warning: Once they start talking.
- Signature Move: "Scramble Missiles!"
- Would Hurt a Child: None of then bat an eye to potentially killing the Baby Ducks.
Voiced by Roger Craig Smith
Debuted in: Season 2, "Temp Check"
An anthropomorphic otter whom Rigby hires as a temp to do his work for him, but turns out to be a con artist who can copy another person.
- Bitch in Sheep's Clothing: He comes off as friendly, optimistic, and hardworking, but deep down, he's a serial scammer stealing other peoples' identities throughout the nation.
- Ditto Fighter: Can transform into anyone and mimic their style trying to steal their life.
- Extreme Doormat: Played straight at first, as he doesn't seem to mind Rigby giving him all his work; but it's eventually subverted when he starts to copy Rigby's mannerisms and try to take over his life.
- Funny Animal: An otter to contrast to Rigby the raccoon.
- Going Commando: He starts off in a white shirt and jeans, but when he's hired he just goes naked like Mordecai and Rigby.
- Jerk with a Heart of Gold: While he did try to steal Rigby's identity, when Doug gets arrested, he encourages Rigby to be grateful for what he has, since Doug doesn't have much to live for.Hey, hold on a sec; I got something to say. Rigby, I want you to know, a guy like me — Ain't got a lot to be thankful for. But you — You got friends, a job, a nice warm bed. You got a good thing going here. Never forget that.
- Nice Hat: A white and red ballcap.
- Shadow Archetype: To Rigby. Both are around the same height, but Rigby is incredibly lazy, but still caring for his friends, while Doug presents himself as a nice guy and a workaholic, when he's really an infamous con artist.
- Spot the Imposter: The park crew test the mannerisms of Rigby and Doug to figure out who's who. Doug gives himself away by hugging Mordecai, which the real Rigby apparently would never do.
- Voluntary Shapeshifting: Doug is able to morph into Rigby's form, and copy his appearance and voice perfectly.
- Workaholic: He truly seems to like working hard.
Voiced by Laura Bailey
Debuted in: Season 5, "The Real Thomas"
Natalia is a Russian spy who goes undercover as Benson's new girlfriend. She's a fellow agent of Thomas.
- Bitch in Sheep's Clothing: She's introduced as a friendly kindergarten teacher to Benson, when she's really a deadly and ruthless Russian spy.
- Dark Action Girl: A Russian spy trained in martial arts.
- Eaten Alive: She's swallowed by a whale when she fights Thomas.
- Evil Counterpart: To Thomas. Both were trained under the Russian government to infiltrate the Park by getting close to the employees in order to set up their plan. But while Thomas grew to genuinely care for the Park members and even made a HeelFace Turn, Natalia showed little remorse over hurting any of them.
Voiced by April Stewart
Debuted in: Season 2: Benson Be Gone
Susan was hired by Mr. Maellard to replace Benson as the new park manager while Benson got demoted, when she turned out to be even worse than the two.
- Attack Its Weak Point: Her Heels.
- Attack of the 50-Foot Whatever: Her One-Winged Angel form.
- Bad Boss: While Benson mostly gets angry when others slack off on their assignments, Susan yells at them and treats them like slaves. It's so bad that Mordecai would rather work for Benson.
- Berserk Button: Employees not doing what she tells them.
- Body Horror: When the others start doing what she asks them, they begin to look just like her and follow her commands. That is, until Benson steps in and returns to his job.
- Catchphrase: "Get back to work!"
- Evil Counterpart: To Benson. Both are competent Park managers who tend to be hard on their employees, but while Benson is a well-meaning Mean Boss, Susan is a controlling Bad Boss
- Femme Fatale: Of course.
Voiced by Roger Craig Smith
Debuted in: Season 2: The Night Owl
The Night Owl is a DJ that freezes Mordecai, Rigby, Muscle Man, and High-Five Ghost alive to become famous forever.
- Attention Whore: His whole plan is mostly for eternal fame.
- Cool Car: Offers a Dodge Challenger for the winner. That the gang destroy at the end.
- Cool Shades: Wears green shades.
- Future Badass: In the future, his head is preserved in a mechanical owl and he's all powerful to where the gang have to go back in time to escape.
- Human Popsicle: Turns the gang into these to keep the contest going forever so he can be forever famous.
- Jerkass: He doesn't see anything wrong with freezing Mordecai, Rigby, Muscle Man, and High-Five Ghost alive for his own selfish gain.
- Manipulative Bastard: Mordecai, Rigby, Muscle Man, and High-Five Ghost were going to share the car, but the Night Owl tricks them into turning on each other.
- Shock Jock: His occupation as a Disc Jockey.
Voiced by Roger Craig Smith
Debuted in: Season 3: House Rules
This mysterious man lives in a place where rules literally do not exist.
- Berserk Button: Telling him what to do.
- Big NO: When he's all alone playing video games and a new rule comes down saying, "No Video Games" causing him to die.
- Loophole Abuse: Mordecai and Rigby beat him by abusing the rule that there are no rules against having rules.
- No Name Given: His name is never revealed and is credited as "Mystery Guy" in the credits.
- The Pig Pen: There's no rule telling him he has to shower.
- The Slacker: Given for a guy who lives in a place where rules don't exist.
Voiced by John Cygan
Debuted in: Season 5: Silver Dude
A street performer who uses his boombox to steal Mordecai and Rigby's act.
- Enemy Mime: Gets turned into a mime when being sent to street jail.
- Greed: He steals Mordecai and Rigby's songs because he wants all the money from their act all for himself.
- Jerkass: He copies other peoples' acts, while claiming that he's not ripping them off. And he doesn't care at all.
- Laser-Guided Karma: When he gets angry and tries to take the money during a street performing battle, he gets sent to Street Jail.
- Plagiarism in Fiction: Mordecai and Rigby are clearly not pleased with them recording their raps and taking all the credit. In fact his whole act is just him playing what they said on his boombox while doing a basic ball trick.
- Sore Loser: He tries to steal the winnings when his act starts to fail.
- You're Nothing Without Your Phlebotinum: He uses his boombox to copy their act; but when his boombox gets destroyed, he tries to rap on his own only to fail miserably.
Voiced by Jason Mantzoukas
Debuted in: Regular Show: The Movie
The main antagonist of the The Movie, he was Mordecai and Rigby's old science teacher (who likewise coached vollyball on the side) who, in the future, now controls the Timenado and intends to wipe out all of existence.
- Alliterative Name: Randall Ross.
- Big Bad: Of The Movie.
- Combat Pragmatist: Utilizes his teleportation in combat.
- Disproportionate Retribution: Wants to the destroy Earth and the whole timeline simply to get back at Rigby for costing him the school's championship volleyball game. To the point he even tries to kill Mordecai despite Future Mordecai working for him. Ironically when Rigby apologizes for his actions, Ross calls the whole vendetta off.
- Evil Laugh: A Running Gag. He constantly tries to do these but it always ends up with him coughing.
- Freudian Excuse: He was devastated by the loss of the championship, which meant that all of his efforts amounted to nothing. This is an Ironic Echo to what Mordecai faces in the movie.
- Hero Killer: Responsible for killing most of the park crew in the future as well as Future!Mordecai when he took bomb meant for his present self.
- Hoist by His Own Petard: His reset necklace is sliced in half by Rigby causing him to consonantly relive his decapitation over and over.
- Knight of Cerebus: Has zero funny traits and is played for seriousness, save for his attempts at evil laughs.
- Last-Name Basis: Everyone calls him by his last name.
- Off with His Head!: Gets decapitated by Rigby in the final battle.
- Portal to the Past: Has gained control of the time stream and uses it to destroy everything with the Timenado. During the final battle, he has the time stream wrapped around his space station, and a hallway is littered wth time portals of Mordecai and Rigby's history together.
- Reality Ensues: Even through Past Rigby apologizes to him for the game and he calls off his revenge, the principal still has him arrested for bringing plutonium into the school.
- Reset Button: Has a necklace which revives him one minute into the past if he takes a fatal blow. It doesn't work if it's sliced in half.
- Teleport Spam: Loves to teleport during fights to gain advantage over his opponents.
- Time Crash: His ultimate goal is to destroy all of time.
Voiced by: Robert Englund
Debuted in: "The Dream Warrior"
The final Big Bad of the show, a mysterious individual who bears a striking resemblance to Pops who resides in space. It is revealed that they are twin brothers with Anti-Pops being the evil one.
- Alas, Poor Villain: Pops ends their duel not by fighting him, but by expressing brotherly love to Anti-Pops through a hug, the positive feelings weakening him enough for Pops to fly them both into a nearby star. At first Anti-Pops reacts with anger and fear, but as the end draws near, Anti-Pops has a moment of regret—implied for everything he's done, but specifically regrets all the one star reviews he gave—and says that he wishes he could take everything back. Pops tells him that he can try, and that they can do it together as brothers. Anti-Pops finally returns Pops's hug, and smiles just before both of them die, at peace.
- Arch-Enemy: Wants Pops dead for some unknown reason and wants to kill him. It turns out because Pops is destined to be the one who can defeat him.
- Arson, Murder, and Jaywalking: A scourge of the stars who's not above erasing anyone who crosses his path or displeases him... and likewise likes to leave one star reviews for restaurants he's never even visited.
- Awesome Mc Coolname: His real name is Malum Kranus.
- Bad is Good and Good is Bad: His happiness feels like sadness to Pops' telepathy.
- Big Bad: Of Season 8. Interestingly he's more a recurring constant threat than the usual one offs that comprise most of the other villains of the show.
- Borrowed Catchphrase: "Bad Show".
- Cain and Abel: He's the Cain to Pops's Abel for they are brothers.
- The Dreaded: Feared all over the universe, including Rawls!
- Establishing Character Moment: Twice. His first cameo appearance has him giving a bad Yelp review even though he'd never eaten at the restaurant in question. His first full appearance has him murdering a store clerk for holding up his ship.
- Even Evil Can Be Loved: Double Subverted. The first attempt, Pops tried to talk him out of committing evil deeds, which did not succeed, in which Anti-Pops nearly erased his brother. The second final attempt in the final episode was successful: Not only was the universe restored to its rightful balance, Pops was able to reach to his brother's heart in the process as both were hurled into a nearby star.
- Evil Twin: To Pops. He's every bit as cruel and evil as Pops is sweet and kind.
- Evil Overlord: Has a massive fleet and starship at his command.
- Final Boss: He's the last enemy the group faces in the series.
- Good Hurts Evil: Pops hugging him in genuine brotherly love and kindness weakens him and leaves him helpless as Pops allows them both to fall into a star.
- Greater-Scope Villain: He manipulated the events throughout the series, and is the most powerful of all the villains in the show.
- Heel Realization: Before meeting his end, he regrets for the one-star reviews and wished he could take it all back. Pops even cheered him up by stating he could try.
- Hero Killer: He kills Pops' teacher, Earl and nearly all the park crew and their allies in the finale. ALL of them improved.
- Hurl It into the Sun: Pops kills him by weakening him with a hug and restraining him while they both fly into a star.
- Jerkass: Not only is he a sociopath, but he purposely gives bad reviews for fun.
- Killed Off for Real: Dies when Pops restrains him with a hug and allows the two of them to fall into a star.
- Knight of Cerebus: His first full appearance has almost no jokes when he's around for the most part and ends with him nearly destroying the main cast, only losing due to a supporting character dying in the process.
- I Lied: In the Final Battle, he tells Pops that all one of them has to do is knock the other one down to win. When Pops successfully (by pinning him under a ship), Anti-Pops simply calls his mooks to attack him and keeps going anyway. When Pops calls him on it, he points out he's not exactly the most trustworthy person.
- Made of Evil: According to The Ice Tape, he is pretty much an embodiment of evil to counteract Pops being Made of Good. The people of Loliland pretty much confirm it.
- Mutual Kill: Every single fight the two of them have fought, he and Pops end their battle in a universe destroying tie, after which they're both reincarnated to do it all over again. Their Final Battle ends with both dying as well, but in a very different way.
- Near-Villain Victory: Nearly destroys the Park Dome in his first appearance, only failing due to Sureshot sacrificing himself to take out the gunner on his ship.
- Not So Above It All: He decides to let Rawls attempt his thousand pushups in two minutes because he "Wants to see how this turns out.". Subverted as he eventually stops him when he has enough of waiting for Pops to show up.
- No-Nonsense Nemesis: Once he has the crew locked in by his ship, he proceeds to immediately use his strongest weapon on the park dome.
- Obviously Evil: A floating black and white Humanoid Abomination (who looks like Pops) decked in a cape and Beard of Evil.
- Omnicidal Maniac: As his title would suggest. If Pops can't become stronger than him, he'll erase everything. He attempts to do this in the finale.
- One-Winged Angel: During his final fight with Pops, Pops manages to knock him off the high platform they're fighting on... only for her to rise back up as a giant, more demonic form.
- Physical God: Is a god-like embodiment of evil so powerful he's capable of destroying the universe. Pops is the only being strong enough to match him, and their fights always ended in multiverse breaking ties.
- Power of the Void: Whenever he erases something or someone, all that remains is a white void in the shape of what was once there.
- Red Baron: Known to many in space as "He who will erase us".
- Redemption Equals Death: During his last seconds of life, he ends up regretting his one-star reviews and genuinely returns his brother's hug.
- Restart the World: He wants to erase the entire universe because he considers it a huge disappointment.
- Together in Death: He and his brother Pops die while hugging each other as they fall into a star.
- Walking Spoiler: Due to both who he looks like and his first major appearance being a massive Wham Episode that changes the direction of the season.