User blog comment:Princess Random/Gravity Falls Secrets/@comment-65.128.99.28-20120909001843

You got it all wrong.

Glasses: Grunkle Stan's

Heart with stitches:On Robbie's jacket

Shooting Star: On Mabel's sweatshirt in episode Tourist Trapped

Llama: On Mabel's sweatshirt in episode Headhunters

Hand with six fingers:On the cover of Dipper and Gideon's books

Star with eye inside:On the back of Gideon's cape

Tree:On Dipper's hat

Claw:On Grunkle Stan's hat

Ice:In The Inconveincing, Dipper gets a bag of Ice for Wendy's friends where he sees the brain with the two eyes, also in Time Traveler's Pig when Dipper hits Wendy in the eye with a baseball and gets some Ice but then runs into the mystery man.

Question Mark:On Soos' shirt.

They give a fair reference to everyone thus far except the police men and Pacifica.