Billy
Biographical information
Born	1995
Gender	Male
Character Information
Species	Human
Interest	Video games
Occupation	Student at Endsville Elementry
IQ	-5
Professional information
Current Residence	Endsville

Billy is an 8 year old boy, a extremely happy-go-lucky child, with an IQ of -5, which is far below the upper limit of being mentally retarded. He has a pink, extremely large nose (it has been shown several times that the nose is removeable), wears a blue and white striped shirt, and covers his orange hair with a red hat. Like his father, he has a number of unpleasant habits, including nose-picking, flatulence, and male chauvinism. Prone to surprising and nonsensical fits of rage, he is extremely hyperactive, with a knack for causing all kinds of disasters, often related to abusing Grim's supernatural items. His fits of rage and the massive destruction he causes with supernatural magic can be so intense it would even scare Mandy away. He also has Arachnophobia, Entomophobia, and Coulrophobia. His Coulrophobia was cured after his Frat Boy dream that Grim scared him into.

According to Grim, everytime he brings Billy to the Endsville Mall, the people "destroy" themselves in Billy & Mandy Save Christmas.