Gundam Build Fighters (2013)

S01E13 Battle Weapon

On the third day of the tournament, supply containers filled with random weapons are scattered across the battlefield for the Gunpla Fighters to use. Each competitor is assigned a specific container number. Sei and Reiji face off against Luang Dallara, a fighter who already caused them problems during the battle royal. To make matters worse, Reiji is nursing a wrist injury from a street brawl that happened outside the arena.