The day before the ceremony marking the completion of the Yajima Stadium, Nils Nielsen invites Iori Sei, Meijin Kawaguchi, and others to an exhibition battle using the new large-scale battle system he has designed. Now that they are all reunited, Sei attempts to show off the Build Strike Cosmos that he has upgraded for the exhibition, but then he notices something missing… Meanwhile, somebody takes control of the stadium`s systems, sealing Sei and the others inside. Before them appears a mysterious group, which has come to challenge them to Gunpla Battle.
- Other Title: Gundam Build Fighters: GM no Gyakushuu, Gundam Build Fighters: GM’s Counterattack, ガンダムビルドファイターズ GMの逆襲, Gundam: Gundam Build Fighters: GM no Gyakushuu
- Status: Completed
- Sub/Dub: Anime Sub
- Anime Type: ONA
- Genres: Action, Mecha, Sci-Fi
- Characters: Iori, Sei, Reiji, Yuuki, Tatsuya
- Score: 7.15
- Rank: 3369
- Popularity: 6230
![[Action] Zone of the Enders: Dolores, I (TV) (Sub) Raw Eng](https://data.animebuu.com/data/84/8472/mal/1_poster.jpg "[Action] Zone of the Enders: Dolores, I (TV) (Sub) Raw Eng")
