Sei Iori is a Gunpla builder whose family runs a hobby shop in a small town. He aspires to be a Gunpla Battle champion like his father, but despite his exceptional building skills, he lacks the combat abilities to compete with other contestants. Then one day, he meets a mysterious boy named Reiji, who helps him improve his confidence in participating in Gunpla Battles. Together, Sei and Reiji battle their way to the 7th Gunpla Battle World Tournament.
Gundam Build Fighters (Season 0)
Letter ~6 years later~ (Episode 1)
Air date: 2014-06-20
Runtime: 2 min
Overview: An epilogue to season one, in the form a letter from China to Yuuma.
SD Knight Fighters: First Half (Episode 2)
Air date: 2014-03-26
Runtime: 5 min
SD Knight Fighters: Second Half (Episode 3)
Air date: 2014-06-20
Runtime: 5 min
Island Wars (Episode 4)
Writer: Yosuke Kuroda
Air date: 2016-08-21
Runtime: 24 min
Overview: The Try Fighters have been invited to a tropical island to be test pilots for Nielsen Labs! Shia, Minato and Gyanko have been invited, too. But there's trouble in paradise... The crystal Nils created is going out of control, and Gunpla are starting to move on their own!
GM's Counterattack (Episode 5) 10.0
Writer: Yosuke Kuroda
Air date: 2017-08-25
Runtime: 31 min
Overview: Nils Neilsen invites Sei Iori, Meijin Kawaguchi and the rest of the group to Yajima Stadium in order to try out his new large-scale battle system. Sei is just about to unveil the improvements he's made to his Gunpla, when a mysterious group appears and challenges them all to a Gunpla Battle!
Battlogue: AI Battlogue (Episode 6)
Air date: 2017-08-04
Runtime: 24 min
Overview: Char Aznable and Ribbons Almark face off in all-new AI-driven Battle Mode!
Battlogue: Smash the Enemy's Secret Factory! (Episode 7)
Air date: 2017-09-07
Runtime: 24 min
Overview: Yuuma and Minato work together to take down an army.
Battlogue : The Adventures of Fumina and Gyanko (Episode 8)
Air date: 2017-10-05
Runtime: 24 min
Overview: Fumina and Gyanko go on a Sailor Moon-esque adventure all their own. Expect a BearGuy appearance or two!
Battlogue: Our War (Episode 9)
Air date: 2017-11-02
Runtime: 24 min
Overview: Having received intelligence from the regular forces, a team of three GN-X types are standing by in the jungle, seeking clues to the location of a private armed organization 's base. A surprise appearance will thwart their attempts to access the base.
Battlogue: Gunpla is the Greatest! (Episode 10)
Air date: 2017-12-07
Runtime: 24 min
Overview: Sei and the Meijin fight a duel between champions.
