This is a perfect example of a bratty little brother.
Annoying Little Brother
Media of origin:
Matthew "Matt" McGuire is Sam and Jo’s son, and Lizzie's younger brother. He is the minor antagonist in the Disney Channel show Lizzie McGuire, and a minor character in its movie The Lizzie McGuire Movie, portrayed as a scheming, witty, cheeky, young prankster who goes to extreme lengths to continuously annoy and irritate his older sister Lizzie, and sometimes his mom and dad. He is friends to Lanny Onasis, his best friend, Melina Bianco, his girlfriend, and is also friends with Lizzie’s friends, David "Gordo" Gordon, and Miranda Sanchez.
He’s pretty much your average brat who always likes to mess with his older sister, Lizzie, a lot.
He is also a very annoying character, not just to some of the main cast, but to many others in the show as well.
Matt is a young troublemaker who likes to make pranks to mess with people, like his sister, Lizzie.
He’s pretty lazy, as he can be seen making messes and causing trouble due to his laziness.
He can also be bossy at times.
He is very stubborn.
In the episode "Lizzie's Nightmare", where he boards the wrong bus to Lizzie’s school, he decides to go with the flow and have fun there, instead of asking people to help him get back to his actual school. That’s a definition of ditching school by going to another school.
In The Lizzie McGuire Movie, he used his video camera to try to blackmail Lizzie, when she was singing in her room and she slipped in the bathroom, and when Lizzie got stage fright at her Junior High graduation and made the curtain fall as she fell. Now that is just evil.
Matt does often get his comeuppances for his bad actions.
He does have some funny moments, like when he tricks Kate into one of his pranks in "Those Freaky McGuires".
He has some good friendships with a few people, such as Miranda, Gordo, Lanny, and Melina. He’s very loyal to them, especially with the boys, as Lanny and Matt have a believable friendship, and Gordo and Matt have some good moments whenever they hang out.
His relationship with Melina is cute and interesting.
He does care for his family deep down, even his sister, Lizzie, while he likes to tease her, he does love her in the end, and they have a great bond, and some heartwarming moments, like when he let Lizzie protect him when they thought a robber was breaking into the house in "Misadventures in Babysitting", and they do work together sometimes to help each other out.
He does do the right thing sometimes, like in "My Fair Larry", when he and Melina helped out an elderly couple, and in The Lizzie McGuire Movie, when he finds out about his sister’s popular sightings at Rome on the internet, when Lizzie was pretending to be Isabella, and he tells his parents, which lead to the family flying to Rome to help Lizzie before she got into trouble.
Lizzie McGuire and The Lizzie McGuire Movie would most likely not be as great without him.