Armored Trooper VOTOMS: Big Battle (1986)

Original title: 装甲騎兵ボトムズ ビッグバトル

Big Battle is a one-shot OVA set after the climax of the original Votoms storyline, but before the epilogue at the end of the series itself. Fyana needs jijirium to survive, and Chirico and his friends hope to obtain more in A Koba. However, they are unaware that Balarant forces are developing their own Perfect Soldier, and are testing his combat abilities in the city’s Battling arena.