Jack has a scare ability much like the Monsters University characters. He also comes with Halloween Town Jack-O-Lanterns for long range attacks.
Jack's Toy Box Adventure is called Jack's Nightmare, where he has to survive enemy attacks for three rounds.
In Disney Infinity 1.0, Jack has four Character Chests, which unlock his costume, the Halloween Town Jack-O-Lanterns, the Halloween Town Gate, and the Sally Costume.
His Special Abilities include "Heightened Senses" and "Super Jumper".