Gerald "Booger" Hausenfeffer, simply called "Booger", is Goober's little brother. Booger is known to be good at math, unlike Goober who is known to be good for science.
"Booger is Goober’s little brother. Booger is good at math, but he’s a little absent-minded (just like his brother). He’s a sweet kid with a bit of a mischievous streak. He’s a friend of the ‘Kinz, but not really in the inner-circle."
Booger is seen in the Arcade game Booger Gets An A, the Count on Math ads, and in the book The Smarty Pants. He is seen in the WShop Item, Booger's Times Tables Poster (apart of the School Theme). His counterpart is Quizzy Bear, since they are both smart, though Quizzy also knows Math and things (science etc).