Unnamed puffy haired boy

The boy in yellow is a resident of Gravity Falls, Oregon.

History
The boy can first be seen in the episode "Headhunters", where he attends the Grand Reopening of the Wax Museum, fighting with another boy.

He can be seen at the Party in "Double Dipper".

In "Irrational Treasure", he is seen celebrating Pioneer Day.

Appearance
The boy has red, curly hair, freckles and usually wears a yellow shirt with a "5" on it, and green shorts.