Goh, a Pokémon Trainer from Vermilion City in Kanto, grew up with parents frequently absent due to work, fostering self-reliance amid solitude. At six, a pivotal Pokémon summer camp with childhood friend Chloe led to a fleeting encounter with Mew, sparking his resolve to capture it and complete the Pokédex. A later three-year stay in Azalea Town introduced Horace, a boy pursuing Celebi, but their bond shattered when Horace’s unexplained absence left Goh disillusioned.

His journey ignited upon witnessing Lugia in Vermilion City, where he crossed paths with Ash Ketchum. The duo joined Professor Cerise’s lab as research fellows. Though determined to make Mew his first partner, Goh reluctantly accepted Scorbunny, whose loyalty persisted despite his initial resistance. Scorbunny evolved into Raboot after a clash with Team Rocket, creating temporary tension, and later into Cinderace during a showdown with Oleana’s Milotic, strengthening their trust.

Goh’s unorthodox capture methods—prioritizing precision curveballs over prolonged battles—enabled rapid Pokédex progress. Notable catches included swarms of Bug-types, the legendary Suicune, and Regieleki during Project Mew trials. Yet miscalculations arose, like exhausting Poké Balls on a Dewgong or navigating Sobble’s reluctant evolution into Inteleon. His growing roster resided in Cerise Park, a testament to his relentless pursuit.

Calm yet prone to impulsiveness, Goh’s analytical nature and fascination with Pokémon biology contrasted with his early social hesitance, shaped by sparse childhood friendships. Bonds with Ash and Chloe gradually honed his teamwork and empathy, exemplified by reconciling with Horace during an Azalea Town revisit. His synergy with Ash blended strategic planning with raw battling passion, though their paths diverged: Goh sought universal capture, Ash championship glory.

Project Mew, an initiative to study Mythical Pokémon, tested Goh as a Chaser through rigorous trials demanding collaboration. Initial resistance to allies like Gary Oak revealed lingering trust issues, yet persistence brought him close to Mew. The creature acknowledged his dedication before vanishing, leaving his dream tantalizingly unfulfilled.

Key relationships defined his growth: Chloe, a childhood confidante reconnecting with Pokémon; Ash, a rival-turned-complementary partner; and Team Rocket, whose schemes evolved from nuisances to challenges showcasing Goh’s sharpening skills. His journey remains anchored in the main series, with no documented expansions into films or spin-offs.