I have never played any of the Pokémon games,
so this section is entirely drawn from game play walkthroughs of others.
The video games shed some light on the lore of Volcanion, but the general
consensus seems to be that Nintendo and Game Freak didn't provide near enough.
What little there is, I will share it here.
Volcanion's Entrance at the Volcano in the
Rocky Ridges Area of Pokopia (March 2026).
Video excerpt provided by Sirloin. In-game audio is known
as "Legendary Pokémon Theme".