|Please note the following:|
This is a list of characters who have had only one speaking appearance throughout the series. Despite only speaking in one episode, they may have made cameos in other episodes.
Some of these characters are villains or antagonists and some of these characters are neutral characters.
- A (MOV) indicates that the character was mentioned in other videos.
- A (VO) indicates that only the voice was heard and not the appearance of the character.
|Mr. Bones||"The Dog Show!" (MOV)||Mr. Bones is a dead dog owned by Joseph who appeared "The Dog Show!". Junior tried to tell Joseph that it was dead, but Joseph didn't believe him. Mr. Bones & Chompy ended up tying in the race at the end, and neither Junior nor Joseph got any of the money. Mr. Bones was also mentioned in "Bowser Junior's Game Night 6".|
|Stephen Hawking||"Smart Jeffy"||Stephen Hawking is a character who was based on someone with the same name in real life. He appeared in "Smart Jeffy".|
|Easter Bunny Genie||"The Golden Egg!"||The Easter Bunny Genie is a character who appeared in "The Golden Egg!". He was freed when Jeffy threw the egg he was trapped in for thousands of years at the wall. By freeing him, there was a golden egg hidden around the house that granted the finder only 1 wish.|
|Marc||"The Life Of Brooklyn Guy!"||Marc is a character who appeared in "The Life Of Brooklyn Guy!". He was making fun of the fact that he did the surgery on the old man himself and how Brooklyn T. Guy missed it, but then got punched in the face & spit on by Brooklyn T. Guy due to how rude he was being to him.|
|Brooklyn T. Guy's Son||"The Call Of Duty Blackout" (MOV)||Brooklyn T. Guy's Son is character who appeared in "The Call Of Duty Blackout!". He ended up eating Mario's oreos since he kept annoying his dad about being hungry. The video ends with Black Yoshi shooting Brooklyn T. Guy's Son since he tried to take the new Call Of Duty. Brooklyn T. Guy was relieved that he was finally dead.|
|Booger||"Jeffy's Imaginary Friend!"||Booger is Brooklyn T. Guy's imaginary friend who is played by Anthony Miller. He is known for annoying Brooklyn T. Guy by saying "you the man" over and over again.|
|Ms. Pacman||"Jeffy and Junior's Big Heist!"||Ms. Pacman appeared on the arcade box and the game.|
|Brandy Harrington||"Joseph's Pet!"||Brandy appeared in the DVD called "Brandy & Mr. Whiskers : The Complete Series.|
Three unnamed firefighters
The three unnamed firefighters appear in "Jeffy's Lie!" when Jeffy is talking about his cool story however three firefighters are running
|Three Military School Students||"Bowser Junior Goes To Military School!"||Three unnamed children are military school students of in "Bowser Junior Goes To Military School! Part 1." They don't have much dialogue and die while running through a path of landmines. Their bodies later appear as part of the 26 Unknown People from The Secret Door!.|
|The Fish||"Sunken!"||Mr. Fish is a fish that Bowser Junior and Cody asked where Ken was.
He responded but was quickly killed by the Killer Whale.
|The Nerd||"Nerd and Bully's"||The Nerd was the main antagonist of "Nerd and Bully's" until The Bully appears as the antagonist of the video.|
|Clone Bowser Junior||"Jeffy's Clone!"||Clone Bowser Junior was Bowser Junior's clone in "Jeffy's Clone!" and was killed by Cody a minute after he was made by the cloning machine. His sentence was "HI GUYS! I'M JUNIOR! WHERE'S THOMAS?? CHEF PEE PEE!!". The real Bowser Junior and Cody did not like Bowser Junior's clone because he was ugly.|
|Debra||"Jeffy Gets Glasses!" (MOV)||For more information, see Debra.
Debra is Brooklyn T. Guy's ex-wife who is said to be very overweight. Brooklyn Guy makes her a sim when he played the Sims 4 and was implied to be African-American due to her sim.
|Pool Shark||"Sunken!"||The Pool Shark is a minor character in "Sunken!."
He pretends to be bad at pool even though he Bowser' bad at pool.
|Bendy||"Bowser's Mistake!" (post-video)||
Bendy is a character who appears in the post-video of "Bowser's Mistake!". When Logan sees the fans on New York, a kid was seen holding a Bendy plush. He also appeared in Chilly's Vlogs.
|Cheez-It Kid||"Jeffy's Sleepover!"||Cheez-It's Kid is a character that appeared in "Jeffy's Sleepover!". He gets Brooklyn T. Guy's snack at the vending machine along with his getting him 2 snacks causing Brooklyn Guy to attack him.
He is put in to foster care later because his mom gets arrested. Him getting beat up by for having his Cheez-Its is likely a reference to a kid in Florida getting beat up by his father for eating all the Cheez-Its..
|Cheez-It Kids' Mom||"Jeffy's Sleepover!"||The Angry Mom is a character that appeared in "Jeffy's Sleepover!" and is the mother of the Cheez-It Kid. She called Brooklyn T. Guy's Boss because Brooklyn T. Guy attacked her child for having his Cheez-Its.
She gets arrested by Brooklyn Guy shortly after he hangs up on his boss for smelling weed on her getting her arrested, having her son put in foster care, and Brooklyn Guy getting his and her sons Cheez-Its.
|Joe||"Jeffy's Sleepover!"||Joe is a friend of Brooklyn T. Guy that appeared in "Jeffy's Sleepover!."
He gives Brooklyn Guy 1 dollar in quarters. Brooklyn Guy also owes him a lot of money.
|Katy||"Cody's Sister!"||For more information, see Katy.|
|Jeffy Junior||"Jeffy's Kids!"||For more information, see Jeffy Junior.
He presumably died when Jeffy put him in the toilet and flushed himself. His mother is a Cheerios Box and his sisters are Puss hole 1 and Puss hole 2, who were also killed by Junior.
|Mr. Hisfriendfromschool||"Joseph's House!" (MOV)||For more information, see Mr. Hisfriendfromschool.
Mr. Hisfriendfromschool is the father of Joseph. He is mentioned by to be abusive as he has mentioned to have beat his wife a lot as mentioned in "Truth Or Dare!" and alcoholic as he kicked Joseph out of the house as mentioned in "The Christmas Special!".
He was only mentioned until his physical appearance in "Joseph's House!" where he is a dry-bones and could turn into a Boo. He his revealed to be dead in "The Alien!" as mentioned by Joseph, meaning he was undead when he appeared in "Joseph's House!"
|Bowser's Dad||"Bowser's Mom"||He is Bowser's father and a mentioned character in SuperMarioLogan.|
|Penguin||"Chef Pee Pee the Octopus!"||The penguin is a character that appears in "Chef Pee Pee The Octopus!".|
|Killer Whale||"Sunken"||The Killer Whale appears as a minor villain in "Sunken".
It is the one who killed Mr. Fish.
|Other Shark||"The Fishing Trip!"||The Other Shark was a minor antagonist of "The Fishing Trip!."
It appeared towards the end of the video when it ate Mario.
|Mario's Emotions||"Inside Jeffy"||Mario's Emotions appear as minor characters in Inside Jeffy. They are a parody of the emotions from Disney's "Inside Out."
They appear at the end of the video.
|Jerry||"Jeffy's Bad Christmas"||Jerry is a minor character in "Jeffy's Bad Christmas."|
|Jimmy||"Stuck!"||Jimmy is a character who briefly appeared in "Stuck!" when he electrocutes Doofy The Dragon.|
|Money Thief||"Jeffy's Piggy Bank!"||The Money Thief is a villain in "Jeffy's Piggy Bank!".|
|Bumble Bee||"Jeffy Gets Stung by a Bee!"||The Bumble Bee is a minor character from "Jeffy Gets Stung By A Bee!" It appeared when it was buzzing around and Jeffy called it a butterfly and forced the bee to get in his mouth.
Then, Jeffy ate the bee which caused him to get stung.
|Hot Dog Man||"Jeffy Sneaks Out!"||The Hot Dog Man is a character who appears in "Jeffy Sneaks Out!"|
|The Bully||"Nerd and Bully's"||The Bully appears as a minor antagonist of "Nerd and Bully's"
He was bullying The Nerd and beating him up which made him cry. The bully also stole The Nerd's cards.
|Sea Monster||"Sunken"||The Sea Monster was a character in "Sunken".|
|Bullet Bill||"The Warp Pipe!"||Bullet Bill is one of the antagonists of "The Warp Pipe!".|
|Hammer Bro||"The Warp Pipe!"||Hammer Bro appears as an antagonist in "The Warp Pipe!".
Just like Bullet Bill, The Piranah Plant and Thwomp, Hammer Bro killed Mario and Bowser Junior.
|Mr. Hippo||"Alien Jeffy!"||Mr. Hippo is a character who appeared in "Alien Jeffy!".|
|Chiquita||"Alien Jeffy!"||Chiquita is the school nurse who appeared in "Alien Jeffy!" and "Detective Jeffy!" as a cashier.|
|Tiger||"Black Yoshi's Call of Duty Loan!"||Tiger is a character who first appeared at the end of "Black Yoshi's Call of Duty Loan!" and was seen chasing Black Yoshi.|
|Thwomp||"The Warp Pipe!"||Thwomp is a minor antagonist of "The Warp Pipe!" who was seen killing Mario and Junior.|
|Rabbid||"Bowser Junior's Pet!"||The Rabbid is a minor character in "Bowser Junior's Pet!".|
|Salesman||"Jeffy's Tantrum!"||The salesman is an identical person, looking and talking exactly like Jeffy, aside from wearing Marx glasses who appears in "Jeffy's Tantrum!".|
|Lime Green Cock-A-Doodle-Tweet Tweet||"Jeffy's Haircut!"||The Lime Green-Cock-A-Doodle Tweet Tweet is a character from "Jeffy's Haircut!".|
|Pooby Claus||"The South Pole Santa!"||For more information, see
Pooby Claus is a santa alter-ego of Chris Netherton.
|Q*bert||"Black Yoshi's Mistake!"||Q*bert is a minor character in "Black Yoshi's Mistake!". He was seen trying to buy something from Loan Dolphin but couldn't afford it. Because of this, he swears like he typically does in the games in response to how he was unable to afford what he was trying to buy. Q*bert also appeared in a Titototter video where he was cursing out Shadow.|
|Michael||"The Christmas Special!"||Michael is an employee of Toy "R" Us who kicked Chef Pee Pee out of the store for choking a kid for a toy.|
|Mojo Jojo||"Forsaken"||Mojo Jojo is the main antagonist of the TV show "The Powerpuff Girls." He appeared in "Forsaken" when Bowser Junior and his friends were watching The Powerpuff Girls on television. During this appearance, he was shown with a machine attempting to destroy the City of Townsville. The Powerpuff Girls crash through the ceiling, much to his dismay, and use their superpowers to end the evil monkey's day! He was also seen on a picture in "Luigi's Mansion Episode 7", and a costume of him was worn by Cody in "Jeffy's Halloween!".|
|Mini-Me||"Jeffy's Commercial!"||Mini-Me is a middleman that makes dirty money clean who resembles Jeffy.|
|Fake Mario||"Bowser Juice Infomercial"||Fake Mario is a minor character in "Bowser Juice Infomercial" Fake Mario first appears when he tries to defeat Bowser but Bowser killed him by beating him up and then burning him.|
|Mr. Whiskers||"Joseph's Pet!"||Mr. Whiskers appeared on the DVD called "Brandy & Mr. Whiskers: The Complete series".
Not to be confused with the cat.
|Perry the Platypus||"The Costume Contest!"||Perry is a character from Phineas and Ferb. Despite never appearing physically he is mentioned in "The Costume Contest!". There, when Junior tried to tell Joseph to find his "parents", he stutters and Joseph thinks he is talking about Perry. Junior then tells Joseph to find him and go get a costume, but he only ends up buying the costume, since Perry was nowhere to be seen.|
|Bloo||"Jeffy's Foster Home!"||Bloo is a character from Foster's Home for Imaginary Friends. Despite never appearing physically, he was mentioned in "Jeffy's Foster Home!", when Brooklyn Guy says that Jeffy needs to go to foster care. He reminds himself of the show, but can't remember Bloo's name. He later remembers it, however.|
|Sonic the Hedgehog||"Chicken!"||Sonic is a one-time character from "Chicken!". He is named after the video game character of the same name.|
|Goofy-Looking Alligator||Jeffy Gets Stuck!||A one-time character from "Jeffy Gets Stuck!" who was played by Lovell Stanton. This alligator desired to help Jeffy when he was stuck under a tree. His voice sounds similar to Goofy's.|
"Jeffy Gets Help!"
Patrick Star is a character from SpongeBob SquarePants. In SML, he first appeared in cover arts for SpongeBob games Logan had in 2007. His first physical SML appearance was in Jeffy Gets help! when Jeffy watching SpongeBob on Nickelodeon. He constantly mistook him for Squidward Tentacles, which he doesn't now, as seen in Alien Jeffy!, where he is seen to distinguish them. A meme toy of him with a suprised face can be seen in Jeffy Breaks His Leg! and Jeffy's Yard Sale!.
|Squidward Tentacles||"Alien Jeffy!"||Squidward is a character from SpongeBob SquarePants. In SML, he is first seen on the cover of "Lights, Camera, Pants!" in GameCube Games 2007. He was mentioned on several later videos, such as Alien Jeffy!, where Jeffy mistakes the Gray Alien for him due to them looking alike, and in Jeffy Gets Help!, when he couldn't distinguish him from Patrick. An abstract painting of him, "Bold and Brash", which is seen in some SpongeBob episodes, is seen next to the dinner table in the new house from late 2017 to 2020. This painting was thrown away in a BTS video for Jeffy and Junior's Big Heist!, due to it being given to Logan by "you-know-who".|
|Orange Zebra||"Jeffy's Pet Tiger!"||Orange Zebra was Jeffy's pet tiger before Orange Zebra was taken away from him.|
|Puppet Ken||"Spoken"||Puppet Ken was built by Cody to prove to Junior and Joseph that Ken can talk. He later got set on fire later in the episode.|
|Templeton the Rat||"Bowser Junior's Rat Problem!"||A one-time character from "Bowser Junior's Rat Problem!" who was played by Lance Thirtyacre. Bowser Junior befriended him, while Chef Pee Pee wanted him out of house and home, due to the rat trying to take his cheese.|
|Mr. Plane Crash Guy||"Jeffy's Drone!"||Mr. Plane Crash Guy is a character who has never made a physical appearance but was mentioned by Brooklyn T. Guy in "Jeffy's Drone!". Brooklyn T. Guy mentioned that Mr. Plane Crash Guy died back in 2001, which is a reference to how 9/11 happened in 2001 and how a bunch of people died from the plane crashes.|
|Makes Bad Decisions Guy||"Jeffy's Foster Home!"||Makes Bad Decisions Guy is a person who Jeffy had to live with in "Jeffy's Foster Home!". He is similar to Does Bad Things Guy, except he's even more murderous & evil. He is friends with Tim.|
|Tim||"Jeffy's Foster Home!"||Tim was Makes Bad Decisions Guy's best friend. He had a chainsaw, which scared Jeffy out of the foster home he was in. He also was the one to bring dinner for Jeffy & Makes Bad Decisions Guy, which the dinner was a human arm.|
|Paige||"The Imaginary Girlfriend!"||Paige made her debut in "The Imaginary Girlfriend!". Joseph ends up falling in love with her, but then she ends up cheating on him with CJ CoolPants, and had kids with him, which caused Joseph to leave her.|
|Petey||"The Science Fair!"||Petey is a piranha plant that made its debut in "The Science Fair!". Cody turned on Beethoven originally, which would help it grow, but after Cody left, Junior turned on MC Bloodstain, which caused it took act more violent. It ended up getting Cody an F, and it also ended up killed Joseph, Chef Pee Pee, and Jackie Chu by eating them. Junior tried to defend it at the end, but it then tried to eat Junior, which caused Brooklyn T. Guy to shoot it.|