Ability · Gen 3 · 1 Pokémon
Color Change
This Pokemon's type changes to the type of a move it's hit by, unless it has the type.
This Pokemon's type changes to match the type of the last move that hit it, unless that type is already one of its types. This effect applies after all hits from a multi-hit move. This effect is prevented if the move had a secondary effect removed by the Sheer Force Ability.
Color Change was introduced in Generation 3. 1 Pokémon and forms can have it.
Pokémon with Color Change
As a regular ability (1)
KecleonColor Change FAQ
What does Color Change do?
This Pokemon's type changes to match the type of the last move that hit it, unless that type is already one of its types. This effect applies after all hits from a multi-hit move. This effect is prevented if the move had a secondary effect removed by the Sheer Force Ability.
Which Pokémon have Color Change?
1 Pokémon and forms can have Color Change: Kecleon.
Effect text from Pokémon Showdown (MIT); which Pokémon have it from Showdown's Pokédex, cross-checked against PokéAPI. Unofficial fan site.