OVA
Description
Fighter Guncannon serves as a warrior for the Lacroa Kingdom within the fantasy realm of Saddrac World, joining Knight Gundam's adventuring party. As a Lacroa Knight, he combats threats such as Satan Gundam and the Zeon Clan alongside companions Knight Amuro, Priest Guntank, and Forest Fairy GM Sniper Custom.

During "The Legendary Giant" chapter, the defeated Monster Black Dragon forcibly possesses Fighter Guncannon's body. This possession allows the dragon's soul to merge with the Sword of Flame and a Dragon Baby, resurrecting it as the more powerful Neo Black Dragon. Under the entity's control, Fighter Guncannon is compelled to battle his former allies in Knight Gundam's party.

Fighter Guncannon's arc culminates in the final confrontation against Neo Black Dragon, where Knight Gundam's party engages the resurrected entity that had subjugated him. This battle resolves Fighter Guncannon's possession storyline.