Robbie Valentino

Robbie is one of Wendy's friends, who appears in "The Inconveniencing." He spray-paints a giant explosion on the water tower, which Dipper thinks is a giant muffin; because of this, he grows a dislike for Dipper and excludes him from conversations due to his age. A portrait of him appears on the suspects board in "Headhunters."

History
Robbie is first seen riding up with Wendy's other friends to pick her up. He is then seen as they drive to the Dusk 2 Dawn convenience store. During the group's stay at the store, he acts very condescending towards Dipper. He makes fun of Dipper when he hesitates to jump the gate, and doesn't think Dipper can get them inside the store when Robbie's efforts to open the door prove to be pointless. Once Dipper gets the kids inside, he is seen partying with the rest of them. Once the ghosts attack, he is one of the only teenagers not to be taken. However, he is not seen when Dipper does the Lamby Lamby Dance to save the group. He next appears in "Double Dipper" at the Mystery Shack party hanging out with Wendy. He ignores Dipper and shows Wendy his new guitar. Saying hi as an obstacle between him getting to dance with Wendy, Dipper and his clones lure Robbie away from the party by stealing his bike away from him.

Personality
In terms of personality, Robbie is a stereotypical teenager: Laid back, carefree, and fun-loving. He is seen as condescending to people younger than him, as shown by his interactions with Dipper.

Physical appearance
Robbie has long black hair with pale skin and piercings. Like some characters on Gravity Falls, he has a pink nose, he wears a black guitar around his chest. His pants are blue with silver keys attached to his belt loop. He also wears a black hoodie with a picture of a red bleeding heart with a scar on it. He also wears black fingerless gloves and has pimples on his face.