Based on XFLAG's Fight League smartphone game.

Chain up, gadget generators! It's time to grind some gears!

Fight League: Where the best fighters come to prove they're number one. Fighters from each Brand fight in preliminary matches for the right to take part in Fight League and claim the glory of victory for themselves.

In the GGG Brand, GGG Brand Cups are held where Fighters use their prized gizmos and gadgets in battle. The keys to victory are Chaining—attacking in combination with your teammates—and strategy!

Our story follows G-Wrench, who leads the team Boltechs and swings a giant wrench gadget like it's light as a feather.

However, a chance meeting with a mysterious girl who suddenly appeared during a battle forever changes the fates of G-Wrench, the Boltechs, and all of GGG!

(Source: XFLAG ANIME)

 AnimeRulz is the best site to watch Fight League: Gear Gadget Generators SUB and DUB in HD quality.