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The Gigan (ガイガン Gaigan?) of the AniGoji continuity was a nanometal-infused, Bilusaludo controlled kaiju that made its first appearance in Godzilla: Project Mechagodzilla.
Gigan (PM)
Gigan
for Gigan in Destroy all monsters part 2: The Conclusion
Suggested by elijahspates
The battle is not over yet as a mutated creature attacks monster island killing any kaiju in its way starting Another battle between monsters.