Mason "Dipper" Pines (voiced by Jason Ritter) is the slightly younger twin brother of Mabel Pines, and is a curious, clever, inventive 12-year-old. With his sister Mabel along for the ride, he dares to uncover the secrets of the mysterious town of Gravity Falls.
Smart, wise, gentle, conventional and very logical, Dipper Pines can't wait to leave adolescence in the rear-view mirror. Born adventurer at heart, Dipper can't sit still and is always looking for the next riddle to solve. His scrupulous attention to detail comes in handy when he is off figuring out the mystery of the day, but sometimes his overzealousness leaves others questioning his credibility. He is wise beyond his years, and his refusal to sit still when there are puzzles to be solved, leaves him restless in everyday situations. He first arrives in Gravity Falls upset with going to a small, boring town, with his twin sister Mabel for the summer, but because of interest in mysteries and lust for adventure he starts to adjust to life in town and tries to solve mysteries, with his twin sister coming along for the journey. He is somewhat protective of his sister, whenever she is in danger he is always there to help and will do anything to get her free. He also hates being called cute and adorable, as he wants a more grown-up and mature appearance to strangers.
In the adventure series Dipper meets the team in Gravity Falls trying to find new members of the cyberchase fighters and take a vacation.They meet Dipper at The Mystery Shack and Dipper try to join the team and he got in and became a member of the cyberchase fighters along with Mabel(as long as he calls his Grunkle Stan everyday and emails him and visit his parents and visit them on holidays and visit Grunkle Stan in gravity falls)
- Jeffrey, Jaden and Hiccup will meet Dipper Pines in Jeffrey, Jaden, Hiccup & Friends go to Gravity Falls.
- Twilight, Sunset and Kyle will meet Dipper Pines in The Rainbooms & The Z Fighters go to Gravity Falls after the events of "My Little Pony Equestria Girls: Legend of Everfree" and "Equestria Girls: Magical Movie Night".