Version-exclusive Pokémon in Ultra Sun & Ultra Moon

Like all the paired games in the Pokémon series, Ultra Sun & Ultra Moon each include Pokémon that cannot be obtained in the alternate version. To obtain Pokémon missing from your version you need to trade with someone who has the opposite version.

Exclusive to Pokémon Ultra Sun

#037
Vulpix
Alolan Vulpix
Ice
#038
Ninetales
Alolan Ninetales
Ice · Fairy
#800
Necrozma
Dusk Mane Necrozma
Psychic · Steel
#250
Ho-oh
Fire · Flying
#347
Anorith
Rock · Bug
#348
Armaldo
Rock · Bug
#641
Tornadus
Incarnate Forme
Flying

Exclusive to Pokémon Ultra Moon

#027
Sandshrew
Alolan Sandshrew
Ice · Steel
#028
Sandslash
Alolan Sandslash
Ice · Steel
#800
Necrozma
Dawn Wings Necrozma
Psychic · Ghost
#140
Kabuto
Rock · Water
#244
Entei
Fire
#345
Lileep
Rock · Grass
#642
Thundurus
Incarnate Forme
Electric · Flying
#698
Amaura
Rock · Ice
#699
Aurorus
Rock · Ice