is a minor antagonist in the SML series. He has a Dutch accent and is voiced by Logan.
First appearing in Bowser Junior's Cheeseburger, he was the one stealing the cheese. Despite asking nicely, Chef Pee Pee fails to get the cheese from him. Later, the chef uses a mouse trap, but the rat grabs the cheese without it going off.
In Luigi's Mansion Episode 6, the rat is a ghost. He finds a lot of cheese and wants to eat it, but Luigi sucks it up.
In Shrek's Homemade Cheesecake, Chef Pee Pee offers to let the rat take all of the cheese he wants after he quits his job for Bowser and starts working for Shrek.
In The Grilled Cheese, the rat repeatedly takes Chef Pee Pee's grilled cheese sandwiches. Because of this, Chef Pee Pee hires the Brooklyn Guy to handle him. The rat simply bites him, so they use more mouse traps, only for the rat to take the cheese, and return the sandwich. The rat later pushes Chef Pee Pee into the traps while he was getting his sandwich. When he returns, he thanks the Brooklyn Guy for the cheese, but gets killed by the Mouse Trap board game, much to the Brooklyn Guy's amusement.
The Rat was heavily panned by SML fans. Many fans hate the Rat due to him being very annoying due to his voice and himself repeating his catchphrase "Cheese!". But despite of this, the Rat seems to have a huge share of fans.