Zero Duel Masters
Japanese title: ゼロ デュエル・マスターズ
Type: TV
Source: Original
Episodes: 12
Status: Finished Airing
Aired: Apr 9, 2007 to Sep 28, 2007
Broadcast: Unknown
Duration: 23 min per ep
Rating: PG-13 - Teens 13 or older
Studios: SynergySP
Genres: Adventure, Comedy, Sports
Themes: Strategy Game
Demographics: Kids

It is featured in an alternate universe where Shobu had lost his duel against Hakuoh in their duel back in the Season 1 episode "Just Duel It".

A mysterious organization is interested in fledgling duelist Shobu Kirifuda's ability to bring Duel Master creatures to life. With the support of his friends, Shobu duels with passion, discipline, and heart as he strives to be like his father and become the next Kaijudo master.

(Source: Duel Masters Wikia)