Robert "Robbie" Stacey Valentino is Wendy Corduroy's ex-boyfriend, who first appears in "Headhunters" via a picture than made a physical appearance in "The Inconveniencing". His greatest claim to fame is a giant explosion he spray-painted on the water tower (along with other spots around Gravity Falls), which Dipper thought looked like a giant muffin. Because of this, and the fact that Dipper also likes Wendy, Robbie grows to dislike Dipper quickly and tries to exclude him from the group due to his age and for having a crush on Wendy.