Gigantik becomes stronger the more he eats.
Gigantik is a member of the Dark Dozen, a group of people looking for power to make others suffer who Masterlord Akuma shapes into the adversaries Yasuiti Motomiya created as a training exercise in the Ninjak video game by tapping into the well of suspended disbelief. The only way Ninjak can defeat Gigantik in the video game is to make him eat a gem that makes him barf.
Centuries ago in Ancient Japan, during a wondrous age when powerful magick ran loose that faded to myth even in the land where it happened, Gigantik and twelve lieutenants followed Masterlord Akuma in his quest for ultimate power, but, after decades of conflict, a small order of fighter-monks turned Akuma’s magicks against him and cast them out of reality itself.
After Denny Meechum solves the puzzle embedded in the Ninjak video game and finds himself transformed into Ninjak, Zeer, an envoy of Masterlord Akuma, sets out to revive the Dark Dozen by using wicked people looking for power to make others suffer.
Gigantik teams-up with Shurikai and Nixie to attack Ninjak at a promotional event for the Ninjak video game, but Ninjak captures Zeer, who orders them to retreat because according to the rules they have to recognize Ninjak’s victory and leave.
When Gigantik and the Dark Dozen attack Motomiya’s Temple, Denny bonds with the symbol of power hidden in the shrine and sets off a huge explosion that seemingly destroys them.
After Ninjak defeats Akuma, Gigantik and the Dark Dozen return to their normal selves.