Steam Engine

Steam Engine (Japanese: じょうききかん, Hepburn: Steam Engine) is an Ability exclusive to the Rolycoly evolution line, introduced in Generation VIII.

Effect

The Pokémon's Speed stat is raised by six stages by Fire- and Water-type moves. The Pokémon does not become immune to damage caused by Fire- and Water-type moves.

Generations	Description
Generation VIII	Boosts the Pokémon's Speed stat drastically if hit by a Fire- or Water-type move.
Generation IX

Pokémon

Pokémon		Type	First Ability	Second Ability	Hidden Ability
	Rolycoly	Rock	Steam Engine	Heatproof	Flash Fire
	Carkol	Rock /  Fire	Steam Engine	Flame Body	Flash Fire
	Coalossal	Rock /  Fire	Steam Engine	Flame Body	Flash Fire

Trivia

• The user having its speed stat increased drastically by Water- and Fire-type moves is a reference to how real-life steam engines require heat and water to help them move faster.