Some Pokémon have adapted to the Alolan region have taken on new appearances and traits unique from their non-Alolan counterparts. These are called their Alolan Forms and can be caught in Pokémon Sun & Moon.
Alolan Rattata &
Alolan Raticate Dark/Normal-type
Alolan Raichu Electric/Psychic-type
Alolan Meowth &
Alolan Persian Dark-type
Alolan Grimer &
Alolan Muk Poison/Dark-type
Alolan Diglett &
Alolan Dugtrio Ground/Steel-type
Alolan Marowak Fire/Ghost-type
Alolan Geodude,
Alolan Graveler &
Alolan Golem Rock/Electric-type
Alolan Sandshrew &
Alolan Sandslash Ice/Steel-type
Alolan Vulpix Ice-type
Alolan Ninetales Ice/Fairy-type
Alolan Exeggutor Grass/Dragon-type