Jack O'Lantern

Dr. Jonathon Grid a.k.a. Jack O'Lantern is a fictional comic book supervillain, and an adversary of Shadowboy. He use to be a doctor at Starkarm University, where he majored in study of phobia, as well as fascinated with halloween mythology. After being fired for his obsession, Grid became the Jack O'Lantern to stalk the night as a halloween-themed villain to cause mayhem and seek revenge.

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Shadowboy Adventures
This covers the Jack O'Lantern's appearances throughout the original Shadowboy television series.

Appearances

 * Nothing to Fear
 * Prophecy of Doom
 * Showdown