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Watch Gundam Build Fighters: GM’s Counterattack full episodes online English Dub.
Other titles:Gundam Build Fighters: GM no Gyakushuu
Synopsis: It has been three years since the end of the Gundam Build Fighters TV series. Now a totally new story starring Iori Sei and friends is set to begin.
Language: English Dub
Aired: Aug 25, 2017
Genres: Action, Sci-Fi, Mecha
Sources: Myanimelist, Wikipedia