Gold AKA Ethan is the main male protagonist of Pokemon Gold/Silver and it's remakes Pokemon HeartGold/SoulSilver.
Gold is a young trainer from the Johto region, who sets out to prove himself three years after Red became the League Champion. Gold is the male protagonist in Pokémon Gold, Silver, and Crystal. Gold's journey as a Pokémon trainer begins when Professor Elm asks him to run an errand for Mr. Pokémon, who lives north of Cherrygrove City. Because he may encounter dangerous wild Pokémon along the way, Elm gives him a choice between three Pokémon to protect him: Cyndaquil, Totodile or Chikorita.
Gold meets another boy his age watching Elm's Lab from outside. When he tries to talk to him the boy abruptly shoves him away. The boy, Silver, will become Gold's rival, analogous to Blue in Generation I. Gold continues onward and finally meets Mr. Pokémon and completes his errand. While there he meets Professor Oak who, upon realizing Gold's bond with his new Pokémon, gives him a Pokédex. On his way back home, Gold again meets Silver, who has stolen one of Elm's remaining Pokémon. After defeating/being defeated by the boy in battle, he learns his name and relays it to the police in New Bark Town. Professor Elm allows Gold to keep the Pokémon he chose earlier, and encourages him to compete in the Johto League.
From there Gold begins on a Pokémon journey in the Johto region, facing off against its eight Gym Leaders, defeating and disbanding the newly reformed Team Rocket, and becoming League Champion by defeating the Elite Four and its previous Champion, Lance at the Indigo Plateau. Along the way he also teaches Silver to respect Pokémon as living creatures and not just as tools for battle. After being declared the League Champion, Gold then takes a short trip on a ship, the S.S. Aqua, from Olivine City to Vermilion City in Kanto. Journeying across that region, he battles against its own set of eight Gym Leaders, including two new faces, Janine, who replaced her father Koga on his promotion to the Elite Four, and Blue, who was formerly League Champion himself, and replaced Giovanni after the latter fled. Upon getting permission from Professor Oak in Pallet Town, Gold heads for Mt. Silver via Route 28. His journey comes to a close when he finally faces the legendary trainer Red deep in Mt. Silver's cave, who had been training there since shortly after he became League Champion three years prior.