Goh is given three trial options and chooses to find Volcarona's scales. He and Ash travel to the Colossus Ruins in Unova, a location they previously visited in Episode 14.
Upon arriving, they learn that Volcarona has disappeared due to the activities of Pokémon hunters. While exploring a nearby mine shaft, they encounter a suspicious man who claims to be searching for Volcarona but is actually a hunter. Pokemon (2019) Episode 80
Goh successfully collects the falling golden scales after the battle, completing his mission and earning his first token toward becoming a member of Project Mew. Why It Matters Goh is given three trial options and chooses
in the World Coronation Series during this same timeframe. Pokemon (2019) Episode 80