So... is Bakegyamon finished or not?
NO, it is not finished.
Why?
The anime finished after the manga:
Anime finished: March 26, 2007
Manga finished: March 20, 2007
... But 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
Sanshirou, a kid living a boring life on a small island, is suddenly invited to participate in a strange game called BakéGyamon.
He's transported to an alternate world where monsters battle each other as part of this game.
Sanshirou discovers that other players have their own motivations for competing, hoping to win a wish granted to the victor.
The challenge for Sanshirou lies in competing with his seemingly weak monster partners, who are just little mud balls.