This article's content is marked as Mature
Nekrozoth found something very brutal for those with a weak heart. The page Principal Steinbeck contains mature content that may include coarse language, sexual references, and/or graphic images which may be disturbing to some. Mature pages are recommended for those who are 18 years of age and older.
If you're 18 years or older or are comfortable with graphic material, you are free to view this page. Otherwise, you should close this page and view another page.
Welcome to summer school, you bunch of failures!
~ Steinbeck to the students
I'm calling your father!
~ Steinbeck to Junior
~ Steinbeck to Shrek

Principal Steinbeck is the main antagonist of the Bowser Junior's Summer School series and Bowser Junior's Homework. He is Bowser Junior's archenemy. He is an evil principal who speaks with a British accent and hates everyone at school, especially Bowser Junior. He later returned as the secondary antagonist in the Bowser Junior's 1st Grade! series. He replaces the teacher with David Winkle. In the end of Bowser Junior's Summer School, he was defeated by walking out of Jackie Chu's classroom and leaves Junior and Jackie Chu. He has a minor role in the Bowser Junior's 1st Grade! series, because he only had a few appearances in the series. He then returned in First Day of School!

He was portrayed by Lovell Stanton, who also portrayed Bubbles and voiced Bowser, Chef Pee Pee, and Joseph.

He was also a supporting villain in a Puppet Pals video called The Perfect Plan.

He also returned in a horror Puppet Pals video called The Vicious Dinosaur returns to town as he appears in the principal's office and he insults Junior and beats him up but then he gets defeated when The Vicious Dinosaur kills him with a gun.


Bowser Junior's Homework

Principal Steinbeck first appears as a minor character in Bowser Junior's Homework. While Bowser is watching an episode of "Charleyyy and Friends", Steinbeck calls him telling about his son Junior falling all of his classes, and then he says that if Junior fails he will kick him out of the school. Then he calls Bowser again about Junior cheating on his test, with Chris the Cucumber.

Bowser Junior's Summer School series

Bowser Junior's Summer School Part 1

In the first episode of Bowser Junior's Summer School, he first appears calling Bowser telling that all the children received their report cards and he says that it will be quite interesting if he looked at it and then he laughs evilly.

Then he appears angry at the students and then he writes his name on the board and calls them failures, and then everybody laughs when Steinbeck sits on his chair and falls and he says any questions before they start and then he says there is no laughing in his class. Shrek asks if he is in the Culinary Cheesecake class. Steinbeck yells at him to get out of the classroom, and Shrek leaves. Toad then throws a paper ball at Steinbeck, and Steinbeck freaks out and beats up Toad. Steinbeck kicks Toad out of the room. Junior asks if he is going to be the teacher, and Steinbeck says the teacher will arrive shortly. While Steinbeck waits for the teacher, someone says "ding dong" outside of the classroom. Jackie Chu enters the room as Steinbeck leaves.

Bowser Junior's Summer School Part 5

In the fifth episode of Bowser Junior's Summer School, he first appears sitting in his office, excited to see Junior so he can punish him. Junior tells that he cheated and Steinbeck calls Bowser immidiately. Bowser is watching "Charleyyy and Friends" and gets interrupted by his phone. Steinbeck tells him that Junior cheated on his test and Bowser has come to the school. Bowser asks what punishment Junior is receiving and Principal Steinbeck comes up with the best punishment.

Bowser Junior's Summer School Part 6

Bowser Junior's Summer School Part 7

In the seventh and last episode of Bowser Junior's Summer School, he first appears looking himself at the mirror and laughing evilly. Steinbeck then hears someone in the stall, then opens it. Junior tells him that Chef Pee Pee molested him, thus throwing Chef Pee Pee in jail. Junior believes his only chance now is to kill the fly, as Steinbeck tells Jackie Chu about the "molesting incident". Junior then notices the fly near Steinbeck's face and risks expulsion to kill it. Junior then kills the fly, knocking out Steinbeck in the process. Jackie Chu is glad that Junior killed the fly and passes him. Steinbeck then gets up and tells Junior that he is expelled but Jackie Chu tells him that he killed the fly so he gets an A+ and Steinbeck lets him go, telling him he's lucky.

He was later mentioned in Bowser Junior's Summer Vacation.

Bowser Junior's 1st Grade! series

Bowser Junior's 1st Grade! Part 1

In the first episode of Bowser Junior's 1st Grade!, he first appears walking from the hallway. Steinbeck informs them that they will have a substitue teacher, who turns out to be Jackie Chu. Jackie Chu walks to the front of the classroom and speaks with Steinbeck for a brief second before adressing his son, Jackie Twu, who he believed to be in college.

Bowser Junior's 1st Grade! Part 4

In the fourth episode of Bowser Junior's 1st Grade!, he first appears in the conference room telling the parents that they goofed when they realized Mr. Winkle was a pedophile, Officer Goodman said that when they did a backround check, he didn't pass, but kept saying that he was hot during the interview, which surprised Steinbeck, saying that Winkle called him hot as well. When the parents ask who the new teacher will be, Stenbeck says he knows who it will be while laughing evilly.

Bowser Junior's 1st Grade! Part 5

Junior hears someone knocking the door, but the person can't be seen. The person knocks the door the second time and it turns out to be none other than Steinbeck, who really wants to talk to Bowser about the incident that happened. He starts eating Doofy O's cereal until Bowser comes in. Steinbeck tells him all about the incident and that Junior is going to second grade. He leaves with the Doofy O's box.

First Day Of School!

Principal Steinbeck returns as a minor villain in the new SML school series called First Day Of School.


Principal Steinbeck is a mean, cruel, unkind, selfish, sadistic, angry, rude, uncaring, somewhat insane, evil and bossy principal. Despite being all of that, he isn't completely evil because he hates pedophiles.


You got that, fellas?! Stein!!beck!!!
~ Steinbeck correcting his name
For all of you failures!
~ Steinbeck scolding to students who failed



  • He wore a hat in Bowser Junior's 1st Grade! Part 4.
  • He grunts sound like a wildebeest.
  • He is similar to The Joker from Batman.
  • In the Bowser Junior's Homework and the first episode of Bowser Junior's Summer School, he speaks with a slight British accent, but in later videos, he speaks with an American accent.


           SuperMarioLogan Villains

Black Yoshi | Boo | Bowser | Bowser Junior | Brooklyn T. Guy | Bubbles | Bully Bill | Bully Bill's Dad | Chica | Crack Bear | Craig the Devil | Evil Croco | David Winkle | Diddy Kong | Does Bad Things Guy | Doofy the Dragon | Drawing Jeffy | Dewey Donedidit | Drug Dealer | Elmo | Evil Chef Pee Pee | Evil Cottonball | Fake Santa | Goodman | Goomba | Goofy | Giant Shrimpo | Hammer Bro | Joseph's Mother | Jeff the Killer | Jeffy | Jeffo | Joseph | Jorge the Drug Dealer | Kamek | Kidnapper | Killer Clowns | Koopa Troopa | Kyle Hoolahan | Killer Whale | Loan Dolphin | Mama Luigi | Mario | Mickey Mouse | Mine! Bird | Mojo Jojo | Mebo | Nancy | Nazi Cheeseburger | Nazi Robot | Principal Steinbeck| Puppet Ken| Piranha Plant| Quiggles | Robot Chef Pee Pee | Ringo | Richard Goodman | Russian Spy | Shrek | Sharon | Sonic | Screwball | Simmons| Shy Guy| Sheila Perkins| Scary Girl| The Rat| The Squirrel| The Turkey| The Alien| The Killer Shrimpo| Thwomp| T-Rex| The Cat In The Hat| The Monster | The Money Thief | The Ouija Demon | The Seeker | The Robber | Wario | Waluigi
Koopa Kids | Pigs

Community content is available under CC-BY-SA unless otherwise noted.