How do you get Mount Travail in Pokemon Mystery Dungeon explorers of sky?

You can't get Mount Travail in Pokémon Mystery Dungeon: Explorers of Sky. It's a location from a different game, Pokémon Mystery Dungeon: Super Mystery Dungeon.

In Explorers of Sky, the main mountain you explore is Mount Freeze, which is a very different location with its own unique challenges and rewards.

If you're thinking of exploring Mount Travail, you'll need to play Pokémon Mystery Dungeon: Super Mystery Dungeon.