Vincent, originally named Junichi in Japanese, hails from New Bark Town alongside childhood friends Jimmy and Marina. Sharing a background as Pokémon Trainers from the same hometown, he wields a Meganium. This Pokémon proved crucial during their confrontation with Team Rocket agents Attila and Hun. When Marina was captured, Vincent aided Jimmy in locating her by tracing her Poké Gear signal, demonstrating their coordinated effort. His Meganium contributed significantly to a combined attack with Jimmy's Typhlosion and Marina's Misdreavus, disrupting the Miracle Crystal's energy field and freeing Raikou.

Vincent harbors romantic feelings for Marina, expressing them more openly than Jimmy's subdued affection. This dynamic surfaced privately at a Pokémon Center where Vincent urged Jimmy not to pursue Marina, revealing his own attachment. His feelings remained unreciprocated within this narrative. Later, Vincent appeared briefly in the main Pokémon anime series during the Johto League tournament, supporting another character in battle while Jimmy and Marina cheered from the sidelines.

The English-language adaptation localized his original name Junichi as "Vincent," creating an inconsistency with prior main series appearances where the same character was dubbed "Jackson." This renaming occurred despite the character's established name in earlier episodes and the Pokémon Crystal video game.