| 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.
Robot Chef Pee Pee
Robot Chef Pee Pee is a robot version of Chef Pee Pee so the real Chef Pee Pee could go on vacation and was used from Happy Merry Christmas! to Chef Pee Pee The Robot although wasn't revealed to be a robot until Chef Pee Pee The Robot where he was the main antagonist.
Bowser Junior throws him in the bath at the end of the episode killing him.
Three Military School Students
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.
They also appear in a flashback in Bowser Junior Goes To Military School! Part 2.
He responded but was quickly killed by the Killer Whale.
For more information, see Scooter.
Scooter is a character that appears in Jeffy's Clone! when Jeffy makes him in the clone machine.
He is biologically Jeffy’s brother.
Scooter is killed by Bowser Junior by a nerf gun.
The Nerd was the main antagonist of Nerd and Bully's until The Bully appears as the antagonist of the video.
Clone Bowser Junior
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 only word is "HI GUYS! I'M JUNIOR! WHERES THOMAS?? CHEF PEE PEE!!". The real Bowser Junior and Cody did not like Bowser Junior's clone because he was ugly.
This version of Bowser Junior was actually in the Mario Plush Collection! video.
He is possibly a reference to SML Parodies.
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.
The Pool Shark is a minor character in Sunken!.
He pretends to be bad at pool even though he is not bad at pool.
He calls again and tells him that officers are getting shoot when Brooklyn Guy and Jeffy are having a pillow fight so Brooklyn Guy pretends to be dead.
It is possible he got shot because he didn't answer at the end of the video. He was never physically seen but his voice is heard.
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.
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.
He gives Brooklyn Guy 1 dollar in quarters. Brooklyn Guy also owes him a lot of money.
For more information, see Katy.
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 Pusshole 1 and Pusshole 2 who were also killed.
For more information, see Mr. His Friend From School.
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 is a mentioned character in SuperMarioLogan.
The penguin is a character that appears in Chef Pee Pee The Octopus!.
The Killer Whale appears as a minor villain in Sunken.
He is the one who killed Mr. Fish.
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 appear as minor characters in Inside Jeffy.
They appear at the end of the video.
Jerry is a minor character in Jeffy's Bad Christmas.
The Money Thief is a villain in Jeffy's Piggy Bank!.
Then, Jeffy ate the bee which caused him to get stung.
Hot Dog Man
The Hot Dog Man is a character who appears in Jeffy Sneaks Out!.
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.
The Sea Monster was a character in Sunken.
Bullet Bill is one of the antagonists of 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.
Thwomp is a minor antagonist of The Warp Pipe!.
The Rabbid is a minor character in Bowser Junior's Pet!.
Jeffy Salesman is an identical person, looking and talking exactly like Jeffy, aside from wearing Marx glasses who appears in Jeffy
Lime Green Cock-A-Doodle Tweet Tweet
The Lime Green-Cock-A-Doodle Tweet Tweet is a character from Jeffy's Haircut!.
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.
Mario (Bowser Juice Informercial)
This version of Mario was thought to be the fake Mario.
Luigi (Bowser Juice Informercial)
Luigi is a minor character in Bowser Juice Infomercial. He first appeared when he found out that his brother, Mario died and then Bowser told him shut up and started beating him up and killing him by burning him. This version of Luigi was thought to be the fake Luigi.
Dory is a minor character who appears in The Fishing Trip!. She appeared when it was revealed that Dory was the fish that Jeffy caught. Because of this, Mario puts Dory back in the water since she's looking for her family in California, which is referencing Finding Dory.
Patrick Star is SpongeBob's best friend and appears in Jeffy Gets Help!. He was seen when Jeffy was watching SpongeBob SquarePants, as he tells SpongeBob that he is sad because he can't get a girlfriend.
He sounds like Goodman because their voices both sound the same.
Timmy is a minor character in The Christmas Special!.
He was strangled by Chef Pee Pee
The Powerpuff Girls are the titular protagonists of the Cartoon Network show, The Powerpuff Girls. They appeared in Forsaken when they stopped Mojo Jojo from his evil plan and then they beat up Mojo Jojo.
The Jumpscare Girl is a cameo character in Mario's Nightmare. She originated from the movie, The Excorsist and appears at the end of the video to give the viewers a jumpscare.
Chef Bowser is the alternate version of Bowser in the original SML universe who appears in the first episode of Mario and Luigi's Stupid and Dumb Adventures (season 3). He is Alternate Chef Pee Pee's slave.
He is similar to Chef Pee Pee in the original SML universe.
Alternate Chef Pee Pee
Alternate Chef Pee Pee (or simply Pee Pee) is the alternate version of Chef Pee Pee in the original SML universe who appears in the first episode of Mario and Luigi's Stupid and Dumb Adventures (season 3). He is most likely the antagonist of the Alternate Dimension.
He is similar to Bowser in the original SML universe.
Harleyyy is the alternate version of Charleyyy in the original SML universe who appears in the first episode of Mario and Luigi's Stupid and Dumb Adventures (season 3). He is Alternate Chef Pee Pee's favourite TV show character.
Alternate Toad is the alternate version of the original Toad in the original SML universe who appears in the first episode of Mario and Luigi's Stupid and Dumb Adventures (season 3).
Unlike the original Toad in the original SML universe, the alternate Toad is a country singer instead of a rapper. He also has a deep voice.
White Yoshi is the alternate version of Black Yoshi in the original SML universe who appears in the first episode of Mario and Luigi's stupid and dumb adventures (season 3). He is the white version of Black Yoshi.
Unlike Black Yoshi, who is a criminal and likes to play Call of Duty, White Yoshi is calm instead of violent and he likes playing Animal Crossing on his Wii instead of Call of Duty since Call of Duty is too violent.
Alternate Shrek is the alternate version of the original Shrek in the original SML universe who appears in the first episode of Mario and Luigi's Stupid and Dumb Adventures (season 3).
Unlike the original Shrek who eats Cheesecake, takes craps and calls Mario donkey, the alternate version of Shrek takes pees, calls Mario camel and eats sweet peas.
Alternate Mama Luigi
Alternate Mama Luigi is the alternate version of the original Mama Luigi in the original SML universe who appears in the first episode of Mario and Luigi's Stupid and Dumb Adventures (season 3). He is the star/mascot of Nintendo in the Alternate Dimension.
Unlike the original Mama Luigi who is retarded, the alternate version of Mama Luigi is smart.
Dora the Explorer
Dora the Explorer is a minor character in Mario and Luigi's stupid and dumb adventures episode 2 (season 3). She was seen when Mario traveles to different dimensions as she was trying to find the Map but she did not find him. Then, she falls asleep.
She sounds like Toad since their voices sound the same.
The Map is a minor character in Mario and Luigi's stupid and dumb adventures episode 2 (season 3).
The Evil Cottonball is the antagonist of Bowser Junior's Biggest Fear!.
Timmy's Mom is a minor character in the 2015 Christmas video, The Christmas Special!.
Gary the Snail
Gary the Snail is a minor character in Pokemon Part 3. He appeared when Toad used him as a Pokemon. However, Bowser Junior and Chef Pee Pee said that he is not a real Pokemon. So, Toad realized that Gary is not a real Pokemon, and then he kicks him.
He later killed Bunghole, causing Jeffy to cry.
Bronx DudeBronx Dude was Brooklyn T. Guy rival, who takes all of his job after Brooklyn T. Guy gets framed for causing a plane crash. He later gets murdered by Brooklyn T. Guy.
Mr. Plane Crash Guy
Mr. Plane Crash Guy was Brooklyn T. Guy's brother. It's mentioned that he died in 2001, which implies that he might have died in the September 11 attacks. It's also possible that he died on American Airlines Flight 587, a plane traveling from New York, that crashed with no survivors, which happened 2 months after 9/11, in which he was the pilot, which some people say that a poorly trained pilot caused the plane to crash.. He was only mentioned in Jeffy's Drone.
Chicago Guy was also Brooklyn T. Guy's brother. He was mentioned in The New House! and made his appearance in Jeffy's Coma! as a cop. Where he gets a call from an unknown person that someone stole the famous bean sculpture from downtown. He thinks it was Chef Pee Pee that stole it, so he drives all the way to his house and while on the way, he spills Hawaiian Punch on his shirt and doesn't want anyone to think that he got shot, it might make him mad. Sometime later, when Chef Pee Pee makes an excuse of thinking that the bean is his mirror, Chicago Guy thinks he is saying the right thing and he likes him. He then leaves the house.
She is a character who first appears in Heartbroken!. She was brought by Bowser Junior when he tried to help Cody find someone else to love, Little is known about her aside from the fact that she likes to eat ants & was kidnapped from the park by Junior.
For more information, see Sharky.
Sharky is a character from Jeffy's Pet Shark!
Sharky is then killed by a bigger shark in the end of the video.
Bigger Shark is the one who kills Sharky at the end of Jeffy's Pet Shark. It was thought by Jeffy that he was Sharky's mother when it was just another shark that ate Sharky. When Brooklyn T Guy explains the truth, it causes Jeffy to cry.
The CrocodileThe crocodile appeared in Bowser Junior's Broccoli Problem!. He hates being called an alligator and loves eating food (possibly meat as well). He currently lives in Bowser's old apartment as a garbage disposal, I guess they forgot about him when they moved to their new house.
WormyWormy was Junior's pet until he traded Wormy to Jeffy for Pee Pee Suck. He then got Wormy back
The Mighty EagleThe Mighty Eagle is a giant bird that can wipe out or basically skip levels in the Angry Birds franchise. In Black Yoshi and The Birds Episode 7, he killed off the pigs when Big Red threw sardines in front of King Pig.
The Eternal Dragon
At the end of The Lamp, he grants Junior's wish for everything to become normal again.
Tito Brown is a scammer who appeared in Bowser's Dilemma, as a guy who delivers fake pizzas to people to get their money. He gets a phone call from Bowser who wants to get a pizza, Tito goes to Bowser's house and gives him a fake pizza, takes Bowser's money, and runs back to his car, jumping through the car's window, and driving away. When Bowser opens the pizza box he finds a note left by Tito that says, "You suck! Learn to Cook!". He borrowed Koopa's car to deliver the fake pizzas
TylerTyler was the minion in Who Wants To Be A Millionaire? Episode 2 working backstage. He only appeared when Toad was introduced.
Loch Ness Monster
the Loch Ness Monster appeared in the end of The Loch Ness Monster!. It was then nuked
The Scary Rabbit was in Jeffy's nightmare and then Junior's nightmare in Jeffy's Nightmare
the Hammerhead Shark appeared in Bowser Junior's Bubble Bath. They ate Bowser Junior.
Tommy was a employee at Jimmy John's. He appeared in Jeffy Gets a Job!. He gets fired when he 'snitches' on Savannah for stealing money from the drawer, then he angrily stomps out of the of the restaurant.