Mr. Mortimer

Mr. Mortimer is a character in the Never-Ending Story. He is a maths teacher that is well-known for losing his temper. Rocko Rama is terrified of him.

Baldi's Basics
He is first mentioned in Chapter 2 Part 12, after Chase McFly and Rocko Rama time travel there from Baldi's Basics. Rocko Rama uses him in a made-up story, depicting him as a teacher everyone is afraid of. It is later revealed that Mr. Mortimer actually taught Rocko Rama when he was 11.

Windows 1337
Mr. Mortimer would appear at the end of Windows 1337, in which it is revealed he is cousins with two clowns.

Back to School
He teaches gymnastics at Here Boot Camp. When the gym class is about to begin, he drags 🅱️Frit to it and starts chewing him.

When he sees everyone in his class, he yells that they should stand up and squat for an hour. Mr. Mortimer then eats some cookies and lounges in his chair.

He looks over at Rocko Rama, who is disguised as a raccoon, and asks if he is okay.