Mountaineer

Mountaineer is a unique ability primarily found on fan-made Pokémon in the online competitive battle simulator Pokémon Showdown's Create-A-Pokémon (CAP) project. This ability provides immunity to the first Rock-type move that targets the Pokémon after it is sent into battle. Additionally, it grants the Pokémon invulnerability to entry hazards like Stealth Rock upon switching in, effectively preventing damage from these hazards.

Key Effects:

1. Rock-type Move Immunity: Upon entering the battlefield, a Pokémon with Mountaineer will avoid the damage from the first Rock-type move aimed at it. This effect only applies once per switch-in.
2. Hazard Immunity: The ability also negates any damage from entry hazards, notably Stealth Rock, which can be particularly harmful to Pokémon with a weakness to Rock-type attacks.

Strategic Uses:

• Ideal for Fragile Pokémon: Mountaineer is especially useful for Pokémon that might otherwise be vulnerable to Rock-type moves