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Chef Poo Poo
Voiced by: Lovell Stanton
A clone of Chef Pee Pee created in the toaster oven by Bowser Junior. Unlike the serious, reasonable Chef Pee Pee, Chef Poo Poo is extremely dumb and loves to play with Bowser Junior.
- A Day in the Limelight: "Chef Poo Poo's Kitchen Disaster!" focuses almost entirely on his character. Ironically, he ended up being Put on a Bus until "Jeffy's Birthday Surprise!" over three years later.
- The Bus Came Back: He returned in "Jeffy's Birthday Surprise!" when Mario tasks him to bake a birthday cake... which goes over about as well as you'd expect.
- Catchphrase: "Hey, everybody!", as a possible Shout-Out to Dr. Nick Riviera from The Simpsons.
- Dumb Is Good: He isn't the sharpest knife in the drawer but he is quite friendly towards others.
- Identical Stranger: He may be an clone of Chef Pee Pee whom isn't related to him, but he looks like an uncanny resemblance of said character.
- Lethally Stupid: Just watch "Chef Poo Poo's Kitchen Disaster!" and look at the fuckin' mess he makes in the kitchen!
- Literal-Minded: When Shrek, mistaking him for Chef Pee Pee, asks him to make cheesecake for him, he tries to make it by putting a block of cheese into Bowser's Mom's cake.
- Naked People Are Funny: He spends much of his time naked, though in "Chef Poo Poo's Kitchen Disaster!", Chef Pee Pee lets him borrow his shirt when he needs him to sub for him after accidentally cutting his hand. This leads to everyone mistaking him for Chef Pee Pee.
- Replacement Flat Character: His personality is very similar to Chef Pee Pee's in the early SML videos.
- Running Gag: A repetitive joke in "Chef Poo Poo's Kitchen Disaster!" is people mistaking him for Chef Pee Pee.
Chris the Cucumber
Voiced by: Lovell Stanton
A talking cucumber who resembles Larry the Cucumber from VeggieTales. Unlike Larry, who gives silly tips and fun advice, Chris gives completely wrong advice while claiming it's correct.
- Everyone Has Standards: In "Chef Pee Pee Gets Sick!", one of Chris' facts was that the Great Red Spot on Jupiter was "your mom's ass". He immediately apologized for his immature comment after color bars appeared.
- Genius Ditz: In all his craziness and spouting out wrong facts, he was amongst the few students who passed the final exam during episode 7 of "Bowser Junior's Summer School".
- Insane Troll Logic: Like Toad, he runs off of idiotic thinking.
- Know-Nothing Know-It-All: Continuously gives out incorrect advice while claiming it's all correct.
Scooter
Voiced by: Matthew Thirtyacre
A clone of Jeffy created with Cody's "CCCloning Machine"
- Ascended Extra: After his debut in the 2018 video, "Jeffy's Clone", he became a recurring character in 2020, appearing in multiple videos.
- Catchphrase: "Hey, fat boy!" and "My name's Scooter".
- The Ditz: He's even dumber than Jeffy.
- Identical Twin ID Tag: Aside from wearing a different shirt, he has a different hairstyle and doesn't wear a helmet.
Drawing Jeffy
Voiced by: Lance Thirtyacre
A deformed copy of Jeffy created with Jeffy's pencil
- The Ditz: Even dumber than Jeffy and Scooter (or Black Yoshi for that matter). He can barely even speak.
- Failed a Spot Check: The Running Gag is that despite him barely resembling Jeffy, nobody can tell the difference. It isn't until the video "Mario Sells Jeffy" that Rosalina notices the difference.
- Flat Character: He's even more idiotic, annoying, and destructive than Jeffy... and that's about all there is to him.
- The Hyena: Constantly laughs.
- They Killed Kenny Again: He has died before and come back. In his case it's justified since Jeffy can just draw a new one.
- Trademark Favorite Food: Mayonaise.
Margaret
Voiced by: Lance Thirtyacre
Bowser's 200-year-old mother.
- Dirty Old Woman: A lot of innuendos come out of her mouth, and at times she has shown lust for younger men. She even goes as far as to demand a stripper for her 200th birthday party. In "Jeffy's Online School", she is revealed to have a live-cam where she strips.
- Granny Classic: Subverted, as she only looks the part but definitely isn't.
- Wacky Parent, Serious Child: The Wacky Parent to Bowser's Serious Child. She is rarely wacky, but she sure looks like it compared to Bowser, as she once demanded a stripper for her 200th birthday, despite Bowser's quotations.
Delilah
Voiced by:
Lovell Stanton (former)
Chilly Jimenez (former)
Elaina Keyes (current)
A Pink Yoshi, and Black Yoshi's ex-girlfriend.Lovell Stanton (former)
Chilly Jimenez (former)
Elaina Keyes (current)
- Affectionate Nickname: She calls Black Yoshi "Big Daddy".
- Interspecies Romance: In "Black Yoshi's Girlfriend Problem!", after she breaks up with Black Yoshi, she hooks up with Popeye.
- Pink Means Feminine: She is a female Yoshi with pink skin.
- Screw This, I'm Outta Here: She leaves Black Yoshi in "Black Yoshi's Girlfriend Problem!" when he hits her for refusing to make him a sandwich.
- The Voiceless: In Bowser Junior's Summer School, she appears with Black Yoshi but doesn't speak for the duration of the entire series.
David Winkle
Voiced by: Chris "Pablo" Netherton
A former first grade teacher, who is a pedophile. He often tries his best to hide the fact that he is a convicted sex offender.
- Berserk Button: While he is normally a very cheery fellow, like any pedophile, rightfully being denied children's clothing is the one thing that actually does make David very angry, enough for him to bring it up a few times in "First Grade! Part 3"
- Big Bad: In Parts 2, 3, and 5 of the "Bowser Junior's First Grade" story arc.
- Catchphrase: "That's hot."
- Hate Sink: His convictions will surely make his character unappealing to most people.
- Pædo Hunt: A convicted sex offender who has a special interest in children.
- Perpetual Smiler: He is always cheerful and enthusiastic about the situation, even when it involves getting arrested.
- Would Hurt a Child: Aside from being a child molester, "The Gun" reveals that he shot and killed 15 children at a playground, going from a child molester to a child murderer with no explanation.
D-Money (Boxer)
Voiced by: Lance Thirtyacre
A boxer who is Rosalina's ex-boyfriend.
- Jerk with a Heart of Gold: He is surprised when Mario keeps getting back up every time he knocks him out. He realizes that Mario must love Rosalina that much if he's willing to let himself get beat up over her, and thus he willingly lets Mario knock him out in a pity fight.
- One-Steve Limit: Averted. He shares the same name with the gangster kid who is one of Bowser Junior's classmates.
Katy
Voiced by: Elaina Keyes
Cody's twin sister, introduced in "Cody's Sister!".- Companion Cube: Much like how her brother has a Ken doll, she is revealed to have a Barbie doll, which she hasn't even taken out of the box.
- Gasshole: She farts several times after eating popcorn.
- Pink Girl, Blue Boy: The Pink Girl to Cody's Blue Boy.
- The Quiet One: She hardly even speaks.
- Verbal Tic: That strange breathy-snore sound.
Feebee
Voiced by: Elaina Keyes (Jeffy's Sister), Chilly Jimenez (Jeffy's Sister Returns)
Possible Full Name: Feebee JeffyJeffy's sister, introduced in "Jeffy's Sister!". Initially thought to be imagined by Jeffy, she turned out of be long gone thanks to their mother's negligence.
- Character Tic: Like Jeffy, she smacks her diaper while making a weird face. Both she and Jeffy also talk to each other in morse code this way.
- Deadly Guest: Is very abruptly killed off when playing with Jeffy in a flashback.
- Expy: In-Universe example: Feebee is designed to be a carbon copy of Jeffy.
- Girlish Pigtails: She has messy uneven pigtails in her brown hair. By the time of "Jeffy's Sister Returns", she's not seen with them.
- Idiot Hair: Fittingly.
- Morality Pet: To her brother Jeffy. He clearly loved her, being traumatized by her death and still missing her. She is also never shown to have been tormented by Jeffy.
- My Nayme Is: Phoebe, but spelled incorrectly.
- One-Shot Character: She has only appeared in "Jeffy's Sister!", and "Jeffy's Sister Returns".
- Parental Abandonment: It is possible that Jeffy's parents dropped her off at Mario's door for the same reason that Jeffy was dropped off at Mario's door. Except both times only happened in Jeffy's dream.
- Pink Girl, Blue Boy: Wears a pink helmet and top, while Jeffy wears a blue helmet.
- Posthumous Character: It's eventually revealed that she was hit by a truck and already killed while riding a bike without a helmet before even her debut.
- Shout-Out: Probably unintentional but some of her physical appearance resembles Meg.
- Vague Age: With Jeffy 14 as of Jeffy's Birthday Surprise and his age being once vague, we don't really know how old she is besides that she's younger than Jeffy is, however, we don't know how much younger.
Gumbo
Voiced by: Chris "Pablo" Netherton
Bowser Junior's Imaginary Friend.
- Exactly What It Says on the Tin: He's Junior's imaginary friend, duh!
- Kill It with Water:
- Chef Pee Pee accidentally sprayed him with water, leaving Gumbo to disintegrate from existence.
- In his reappearance, he gets milk spilled on by Drawing!Jeffy.
- One-Shot Character: Only appeared in "Bowser Junior's Imaginary Friend!", and hasn't made any appearances since, although he reappeared in "Drawing Jeffy!".
Thomas
A Thomas & Friends toy, of whom Bowser Junior treats as his Companion Cube.
- Companion Cube: Junior believes he's real.
- Demoted to Extra: He mainly appeared alongside Junior in a lot of videos initially, but as of 2016 his appearances are mainly restricted compared to Junior's friends Joseph and Cody.
- Suddenly Voiced: He has a few lines of dialogue in "Bowser Junior's 6th Birthday" and "Bowser Junior's Breakfast", though in the rest of his appearances he isn't shown to talk.
The Rat
Voiced by: Logan Thirtyacre
A French rat who likes to steal cheese.
- Trademark Favorite Food: Cheese, duh.
- You Dirty Rat!: And this rat is a thief.
The Crocodile
Voiced by: Lance Thirtyacre
A crocodile who appears in the episode, "Bowser Junior's Broccoli Problem!". He used to live in the sewers, but eventually got a job as Bowser's garbage disposal.- Big Eater: He makes a huge mess when he raids the pantry of Bowser's apartment, eating every food he sees. When Brooklyn T. Guy is unable to get him to leave, he gets a job as Bowser's garbage disposal.
- I Am Not Weasel: He does not like being called an alligator. He even had to show Junior, Joseph, and Cody the differences between an alligator and a crocodile when they kept thinking he was an alligator.
- Never Smile at a Crocodile: Though he's actually more hungry than evil.
- One-Shot Character: He appeared in "Bowser Junior's Broccoli Problem!", and hasn't made any appearances since.
- Sewer Gator: Sewer Crocodile, to be precise.
Chef Pee Pee's Pirate Father
Voiced by: Lovell Stanton
Exactly What It Says on the Tin: A deadbeat pirate who is Chef Pee Pee's father, at least until King Strongbottom was revealed to be it.- The Alcoholic: Usually holds a bottle of beer in his arm.
- I Am Not Your Father: In "Chef Pee Pee's Family", when Chef Pee Pee tries to prove to King Strongbottom that he is his real father, he reveals that he isn't his real father, and just came to Bowser's house to drink his beer.
- A Pirate 400 Years Too Late: And how!
King Strongbottom
Voiced by:
Chris Netherton (former)
Lance Thirtyacre (current)
Chris Netherton (former)
Lance Thirtyacre (current)
Chef Pee Pee's biological father, and the self-proclaimed King of the Iron Asses of Wales.
- Mistaken Identity: Bowser Junior thinks he's Captain Crunch.
- Unexplained Recovery: Was killed off in 2015, only to suddenly, and without warning, reappear in "Jeffy's Shirt!" in 2017.
Stacy Strongbottom
Lance Thirtyacre (former)
Elaina Keyes (current)A cheerleader, Chef Pee Pee's older sister, and the first-born daughter of King Strongbottom.
Elaina Keyes (current)A cheerleader, Chef Pee Pee's older sister, and the first-born daughter of King Strongbottom.
- Foolish Sibling, Responsible Sibling: The foolish to her sister and Chef Pee Pee's responsible.
- Sibling Rivalry: She has this with her sister.
Chef Pee Pee's Sister
Voiced by: Chris "Pablo" Netherton
Chef Pee Pee's unnamed older sister, and the second-born daughter of King Strongbottom.
- Foolish Sibling, Responsible Sibling: She and Chef Pee Pee are the two responsibles to Stacy's foolish.
- No Name Given: Her real name is unknown, as it is never said.
- Sibling Rivalry: She has this with Stacy.
Sonic the Hedgehog
Voiced by: Lovell Stanton
Mario's arch-rival, prominently featured in the "Mario and Bowser's Stupid and Crazy Adventure" story arc.
- Back from the Dead: Black Yoshi shot him in the eye in Part 6 of Mario and Bowser's Stupid and Crazy Adventures, killing him. He returns as one of Bowser Junior's customers in "Bowser Junior's Lemonade Stand!".
- Cool and Unusual Punishment: In Part 3 of Mario and Bowser's Stupid and Crazy Adventures, to get him to talk to them about where Princess Peach is, Bowser and Mario encase him in a plastic bag and knock him out, then they do such things as pour tea down the sink, crumple up a picture of the Queen of England, brush his teeth and drown him in the sink.
- Evil Brit: Justified example. After Mario and Bowser torture him through cool and unusual punishments and lock him in the back of a car, he threatens to kill Princess Peach as revenge. Then he kidnaps Peach's newborn daughter and beats up Mario until Black Yoshi kills him.
- No-Holds-Barred Beatdown: Sonic gives Mario the beating of his life, as Revenge for Mario locking him up in the back of a car and for his cool and unusual punishments.
- I Am Not Weasel: He is often mistaken for a cat, much to his annoyance.
- Interspecies Romance: He dated Princess Peach in "Mario's Wig".
- Super-Speed: He has it, much like his canon Sega counterpart. In Part 6 of Mario and Bowser's Stupid and Crazy Adventures, this makes it impossible for Mario to fight him back, so Bowser enlists Black Yoshi's help.
The Cat in the Hat
Voiced by: Chris "Pablo" Netherton
The titular character from the Dr. Seuss book of the same name. He only appears in the episode of the same name.
- Jerkass: He comes to the apartment with the express purpose of destroying stuff.
- One-Shot Character: Only appeared in the episode of the same name, and was killed off at the end of it.
- Rhymes on a Dime: Much like his canon Dr. Seuss counterpart. He explains to Junior that it's a pain for him to rhyme everything, but he gets paid for every rhyme he makes.
- Your Head Asplode: He suffers it when he tries to think of a rhyme for "orange", although Cody says he could've said "door-hinge" since that rhymes.
Nancy
Voiced by: Chris "Pablo" Netherton
A chainsmoking alcoholic prostitute who is Jeffy's biological mother.
- Abusive Mom: She frequently hit and yelled at Jeffy, which explains his weird behavior. There's also the flashback from Jeffy's Sister Returns, where she makes Feebee give her the helmet she wore to use as an ashtray before sending Jeffy and the latter to teach each other how to ride a bike, which ends with the latter dying.
- Always a Bigger Fish: Bowser is abusive to his son Junior, or Mario is also abusive to Jeffy, but Nancy manages to outdo them both.
- The Bus Came Back: In "Jeffy and Junior Go To Prison!" where she tries to kill Jeffy for locking her up back in her debut.
- Big Bad: Of "Jeffy's Parents!", "Jeffy's Sister Returns!", "Jeffy's 17th Birthday!", "Jeffy's 18th Birthday!", and "Jeffy's 19th Birthday!".
- Bitch in Sheep's Clothing: When she came inside the new house, she acted like she cared for Jeffy at first and even wanted him back after his real father died, only to abuse Jeffy in front of Rosalina and Mario.
- Borrowed Catchphrase: She does Jeffy's "I don't even know" when Mario asks if she's pregnant.
- Brawn Hilda: She's anything but beautiful or feminine and has a deep, manly voice.
- Fat Bitch: While she says she may be pregnant in her debut, she has the same bloated potbelly in future videos, proving she is really just fat.
- Faux Affably Evil: Nancy to a certain extent is able to pull off the look of a concerned mother that misses her child. However, it's nothing more than an act, and it doesn't take a lot for her to flip out and show her true colours.
- Foil:
- One could makes the case for Rosalina and Mario. Rosalina because Nancy is ugly and abusive towards Jeffy, while Rosalina is much more pretty and cares for Jeffy a lot! Mario could also be an interesting case because while he does hurt Jeffy, Mario at least shows a little bit of care and only lashes out at Jeffy whenever he's annoying him or being a bad kid, whereas Nancy hurts Jeffy just because she could care less about him. And while Nancy only claims Jeffy back to try and claim Jeffy's fortune, Mario adopts Jeffy before he finds out he's the son of the famous painter, Jacques Pierre François.
- If one thinks about it, she is a lot like Joseph's mom in a way. Both of them are the abusive mothers of one of the main characters, and their reasons for hurting their children purely stem from their own greed. However, whereas Nancy is a Disposable Sex Worker that just so happened to give birth to the son of a famous artist, Joseph's mother is just a regular woman and her husband (so far) isn't anyone of notablefame either. Nancy also tried to bring her son back so she could inherit the fortune of his father and become rich — even sweet talking Mario and Rosalina into handing Jeffy over — while Joseph's mother is already rich and disowned her son without even trying to sugarcoat her words. Also, Nancy is a grossly-exaggerated Obviously Evil Gonk who doesn't even try to hide her abuse — even beating her son right in front of Mario and Rosalina — as opposed to Joseph's mother, who is rather plain looking (not ugly by any means, but no one brings up her looks as a defining trait of hers) and is a lot more subtle with her abuse and as a result, she is much more realistic and frightening. In terms of backgrounds, while Joseph's mother arguably has a reason for her behaviour (though in no way does it justify traumatizing her son), Nancy doesn't seem to have much of a reason for hurting Jeffy and just does it because she can. Lastly, Joseph's mother has suffered no consequences for her actions, while Nancy at the very least got what was coming to her (even if it was only because of Mario calling the cops on her).
- For the Evulz: Unlike Joseph's mother, who (debatably) had a reason for wanting to leave her son behind, Nancy is never given a reason for her terrible behaviour (she does want Jeffy's fortune, but she was still abusing him even back then) and seems to be doing it purely out of spite towards Jeffy.
- Gonk: One look at her, and you wonder why the HELL Jacques would wanna sleep with Nancy, much less conceive a child with her. note
- Hate Sink: Look at her tropes.
- It's All About Me: She only cares about herself and the millions of dollars that Jeffy inherited.
- Jerk with a Heart of Jerk: One of the absolute biggest jerks in the series. She is an alcoholic child abuser who beats her son Jeffy, and purposefully abandons him. She also wants him back when Jeffy's real father died, in order to take Jeffy's inheritance from him.
- Knight of Cerebus: She is a more serious and threatening villain compared to other antagonists. She is an alcoholic child abuser who beats Jeffy, and purposefully abandons him.
- Killed Off for Real: In "Jeffy's 18th Birthday" she's shot to death by Jeffy and then her lifeless body gets blown to smithereens after Simmons accidentally blows up Screwball's van. Subverted when she somehow managed to escape in "Jeffy's 19th Birthday"...and then double subverted when Brooklyn Guy mows her down with a MAC-10 at the final stretches of the same video.
- Parental Abandonment: One year prior to "Jeffy's Parents!", she dumped Jeffy off at Mario's apartment and was glad to be rid of him.
- Parent Never Came Back from the Store:
- Villainous Breakdown: When she is arrested, she is kicking and screaming in a last-ditched effort to get Jeffy back.
- Walking Spoiler: It's hard to talk about her without revealing she's Jeffy's biological mother.
- Would Hurt a Child: Is very physically abusive to Jeffy.
Jacques Pierre François
Voiced by: Chris "Pablo" Netherton
A world-renowned artist from Paris, France, introduced in "Bowser Junior's Painting!", who is later revealed to be Jeffy's biological father.
- Driven to Suicide: Revealed to have happened to him in "Jeffy's Parents!". This results in Jeffy inheriting his wealth, which in turn results in Nancy, Jeffy's mother, getting Jeffy back in order to take Jeffy's inheritance and become rich. Buuuuut...
- Faking the Dead: It is revealed in "Jeffy's 18th Birthday!" that he faked his death so his paintings would increase in value.
- French Jerk: He taunts Junior for painting a picture of a pepperoni pizza during an art duel with him, and is pretty arrogant when it comes to his artwork in general. As "Jeffy's 18th Birthday" would reveal, he's a terrible guy in general, having deliberately abandoned Jeffy and scoffing at the idea of reuniting with him and making amends when asked about the matter.
- Minor Major Character: He's a one-off character who also happens to be Jeffy's father.
- Only Sane Man: The only member of Jeffy's family with any sliver of talent or intelligence.
- True Art Is Incomprehensible: The basis of his whole career. To put things into perspective, he got famous for sneezing on a canvas.
Easter Bunny Genie
Voiced by: Chris "Pablo" Netherton
A bunny genie that appears in "The Golden Egg!", and is freed from an egg thanks to Mario and Jeffy.
- And I Must Scream: He was trapped inside of an egg for thousands of years.
- Jackass Genie: Implied. He laughed at Jeffy when he got beat up for wasting his wish.
Does Bad Things Guy
Voiced by: Chris "Pablo" Netherton
The Big Bad of "The Secret Door!", being the one who killed the 26 people who lived in the new house and tries to kill Mario, Rosalina, and Jeffy.
- Asshole Victim: Let's see here, a Serial Killer who has murdered 26 people (which includes women and children), impersonated his brother for 7 months, constantly cut off parts of dead bodies for pleasure (even taking pictures of them in a similar vain to Mr. Winkle), and almost tried to kill Mario, Rosalina, and Jeffy when they discovered what's inside the door. Can you name anyone who'd miss him?
- Ax-Crazy: Since he killed the 26 people who lived in the new house, this is obvious. He even takes pictures of the victims he kills in order to savor the moment.
- Big Bad: Of "The Secret Door!".
- Big Damn Heroes: In "Jeffy’s Parents!", he was called by Mario to arrest Nancy and put an end to her abuse to Jeffy.
- Card-Carrying Villain: His name is literally "Does Bad Things Guy".
- Evil Redhead: Has red hair and is eventually revealed to have killed 26 people.
- Evil Twin: To both Brooklyn T. Guy and, apparently, Does Good Things Guy.
- Failed a Spot Check: Fails to notice the door opening, which gets him killed. Not that noticing the door opening would do him much good anyway, since Brooklyn was armed with a gun and was at a distance too far away from him to react in time.
- Faux Affably Evil: Spends pretty much all of his time pretending to be good, and drops the act completely during the "The Secret Door!"
- Hate Sink: Let's see. Killing people so he could romanticize with the dead. His angry attitude. His whole premise itself. Pretty obvious.
- I Love the Dead: If his constant need to take pictures of his carcasses is of any indication.
- Jerkass: Given that his name is DoesBadThings Guy, this is to be expected.
- Killed Off for Real: Granted, he deserved it.
- Knight of Cerebus: Is much more serious compared to other villains and he's probably even worse than Nancy.
- Meaningful Name: Exaggerated; he does bad things, but Brooklyn T. Guy didn't expect it to be that extent.
- My God, What Have I Done?: In "Pinch! Pinch! Pinch!", he gets horrified after he accidentally kills Junior.
- Names to Run Away from Really Fast: Too bad there were too many people who didn't know his true name before they had the chance to even run.
- Pet the Dog: He says that he sold the house to Mario, Rosalina, and Jeffy because he likes them. Though possibly Subverted as it's likely he was just impersonating his brother at the time, so whether he likes them or not is hard to confirm, he also lied about the reason he sold the house since he did it for his brother.
- Although, he very strongly warned them about not opening the door, and given that he did nothing to them before Jeffy opened it, it's likely he was fine with them living there. Also likely Subverted as he mostly just didn't mind them living there because they hadn't discovered his secret and tries to kill them when they discover his secret
- He also said that he was a doctor, cop, etc depending on what job he was called for and helped Mario, Rosalina, Junior, etc for whatever reason it was for. Subverted as he doesn’t have these careers and these outfits were stolen by the bodies.
- Serial Killer: For the past 26 people, he let them stayed in his home, only for them to go into the secret door, leading him to kill them in secret.
- Vocal Evolution: He does a fabulous impersonation of Brooklyn T. Guy, but once his true colors were revealed, he speaks in a slightly higher pitch than Brooklyn. But that's still a rather specific difference, so he could've fooled anybody.
- Walking Spoiler: Just knowing that he killed the 26 people who lived in the house and he's the identical twin brother of Brooklyn T. Guy will give away who he is.
- What Did You Expect When You Named It ____?: Naturally lampshaded by Mario.Mario: Well, he's name is Does Bad Things Guy! What'd you expect?!
- Would Hurt a Child: Some of the bodies look like the puppets used to represent children, implying that he is fine with murdering children to hide his secret. It's also safe to say he would also kill Jeffy if it weren't for Brooklyn T. Guy.
- He was also the one who shot Junior in "Pinch! Pinch! Pinch!".
Joseph's Mom
Voiced by: Lance Thirtyacre
Joseph's Hispanic mother who later dies...which is revealed to be a lie in "Joseph's Mom!".
- Abusive Mom: She abandons Joseph for two years thus torturing him in absentia mentally and psychologically. And when they finally reunite, she outright tells him she doesn't want him in his life anymore.
- Bitch in Sheep's Clothing: In her early appearances, from what little we see of her, she seems to be a decent lady. A little cuckoo sure, but no one actively horrible. Man, oh ''man'', were we in for an unpleasant surprise!
- Domestic Abuse: According to Joseph, she was often domestically abused by her alcoholic husband. That still doesn't excuse her disowning Joseph right in front of his face.
- Foil: If one thinks about it, she is a lot like Nancy in a way. Both of them are the abusive mothers of one of the main characters, and their reasons for hurting their children purely stem from their own greed. However, whereas Nancy is a Disposable Sex Worker that just so happened to give birth to the son of a famous artist, Joseph's mother is just a regular woman and her husband (so far) isn't anyone of particular fame either. Nancy also tried to bring her son back so she could inherit the fortune of his father and become rich — even sweet talking Mario and Rosalina into handing Jeffy over — while Joseph's mother is already rich and disowned her son without even trying to sugarcoat her words. Also, Nancy is a grossly-exaggerated Obviously Evil Gonk who doesn't even try to hide her abuse — even beating her son right in front of Mario and Rosalina — as opposed to Joseph's mom, who is rather plain-looking (not ugly by any means, but no one brings up her looks as a defining trait of hers) and is a lot more subtle with her abuse and as a result, she is much more realistic and frightening. In terms of their backgrounds, while Joseph's mother arguably has a reason for her behaviour (though in no way does it justify traumatizing her son), Nancy doesn't seem to have much of a reason for hurting Jeffy and just does it because she can. Lastly, while Nancy got what was coming to her, Joseph's mom has suffered no consequences for her actions.
- Freudian Excuse: The only way that you could possibly justify her wanting to leave her old house behind is that she was abused by her husband. OK, fair enough, but that doesn't excuse leaving her son in an abandoned home to feed himself and inflicting psychological and mental damage onto him via the fake skeleton. Sure, Joseph is shown to be a little disobedient, but he certainly wasn't mentally crazy at the time and it's clear that, for all his faults, that he truly did love his mother. So while she might have an actual reason as opposed to Nancy, in no way does it make her even the least bit sympathetic.
- Hate Sink: Everything about Joseph's Mom is very selfish and unlikeable mother who did this to her own son Joseph.
- It's All About Me: Abandons Joseph over a ten million dollar lottery ticket.
- Jerkass: Revealed to be a huge one in "Joseph's Mom!" where she abandons Joseph for two years only to disown him after they reunite.
- Karma Houdini: Unlike characters such as Nancy or Does Bad Things Guy, Joseph's mother never faces any consequences for her actions, despite, you know, inflicting psychological trauma onto her son. It doesn’t help that Junior, Cody, and even the police are either bummed out by it (but unwilling to do anything to help Joseph), or completely apathetic to it at most.
- Knight of Cerebus: She is directly responsible for the dark turn in "Joseph's Mom!", where it's revealed she abandoned him for all those years. And like Nancy and Does Bad Things Guy, it isn't played for laughs either.
- No Name Given: She's just called Joseph's Mom and her real name is never revealed. It's safe to assume her last name is Hisfriendfromschool.
- Parental Abandonment: In "Joseph's Mom!", it's revealed that she faked her death because she didn't want Joseph in her life anymore.
- Small Role, Big Impact: She only appeared some minor appearances, but if she had loved her son Joseph and be with him instead of abandoning him as an Abusive Parent, then Joseph wouldn't end up having mental and insane problems as an Ax-Crazy Psychopath who almost killed Junior in "Joseph Moves In!".
Santa Claus
Played by: Anthony Miller and Tito Jimenez
A man from the North Pole who is associated with Christmas and brings presents to the homes of well-behaved children.
- Butt-Monkey: His encounters with the housemates almost never end well for him. Especially when Jeffy demanded he give him toys.
- Jabba Table Manners: In "How Black Yoshi Stole Christmas".
- Running Gag: Him constantly trying to escape from Jeffy's clutches.
Richard Goodman
Voiced by: Lance Thirtyacre
The son of Mr. Goodman.- Aesop Amnesia: Deconstructed. He learns that money can't buy happiness in his debut appearance, but his father explodes at him, and forces him to forget this lesson so he can mold him into a miniature version of him and carry on his legacy of being a rich asshole who always gets his way and rules over the middle class with an iron fist.
- Bratty Half-Pint: Enforced by his father.
- Screw the Rules, I Have Money!: His response to being scolded or denied anything he wants is toss a stack of money at the other person. This is in contrast to his father, who threatens to inflict extreme physical harm to force his victims to comply with his often-unreasonable demands.
Big Bwah
Voiced by: Lovell Stanton
Black Yoshi's adoptive son.- Ambiguously Related: The same doll is used to represent Charleyyy's son in one episode.
- Big Brother Bully: To his adoptive sister, Burger Kingwuh.
- Enfant Terrible: Is only a baby yet still has a mean expression and flings his own younger sister over the couch.
