Wild Arms: Twilight Venom(1999)

Wild Arms: Twilight Venom is an anime series set in a wild west frontier where ARMS—mysterious weapons of devastating power—shape the fate of those who possess them. Sheyenne Rainstorm, a twenty-five-year-old gunslinger, finds himself trapped in the body of a five-year-old boy after acquiring one of these rare artifacts. Desperate to reclaim his original form, he reluctantly teams up with Dr. Kiel Aronnax, fortune hunters Loretta Oratorio and Crimson Noble Mirabelle, and others drawn together by circumstance. As they traverse a landscape populated by gunfighters, con artists, dragons, and eccentric librarians, the group pursues clues to unravel the mystery of the ARMS. Their conflicting goals—survival, treasure, and answers—collide repeatedly as they navigate danger and deception across the untamed west.