So... is Ougon Bat finished or not?
NO, it is not finished.
Why?
We found unfinished non-core content:
Ougon Bat: Taishou Dokuro Kitan (Alternative Version)
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Synopsis
Ougon Bat tells the story of a benevolent, golden-armored guardian, resurrected from an ancient slumber.
This powerful protector, awakened by a team led by a dedicated scientist and the compassionate Marie, emerges to defend the world.
His arrival, marked by a distinctive golden bat symbol and an ominous laugh, signals hope against looming darkness.
He utilizes his incredible abilities to stand against the wicked schemes of the villainous Dr. Zero and his forces, striving to maintain peace and justice.