Squirm the Worm

Squirm the Inchworm was an inch worm once owned by Greg Heffley, and was only seen in Hard Luck. Greg referenced him when he found his mother's parenting books hidden in her closet.

Biography
Squirm the Worm was Greg's pet he found. Greg would let him out of his jar so he could get exercise. Squirm survived for a while, but when Manny was taking his first steps, he killed Squirm by accidentally squashing him.