What are all the Pokemon you can't catch in Ultra Moon, but need to complete the Alola Pokedex?

Question

Trade evolutions count.

Comments

Not a full answer, but https://bulbapedia.bulbagarden.net/wiki/Pok%C3%A9mon_Ultra_Sun_and_Ultra_Moon

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Sorry, I don't know what a 'Poekdex' is lol

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If you can choose any 1 of 3 starters, do the other 2 count as not catchable?

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@sumwun - Of course they would.

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@Azelfeo is right

Answer 1

• Hau's Starter
• Kukui's Starter (the last one)
• Solgaleo
• Blacephalon
• Buzzwole
• Kartana
Trade
• Slowking
• Alakazam
• Gengar (rare SOS w/Haunter @ Abandoned Thrifty Megamart)
• Machamp
• Gigalith
• Huntail (rare SOS w/ Clamperl; Nighttime @ Melemele Sea + Route 15)
• Gorebyss (rare SOS w/ Clamperl; Daytime @ Melemele Sea + Route 15)
• Milotic
• Magmortar
• Porygon2/Porygon-Z
• Electivire
• Golem
Exclusive to Ultra Sun
• Vulpix/Ninetales
• Passimian
• Turtonator
• Omanyte/Omastar
• Houndour/Houndoom
• Anorith/Armaldo
• Cranidos/Rampardos
• Cottonee/Whimsicott
• Tirtouga/Carracosta
• Golett/Golurk
• Rufflet/Braviary
• Clauncher/Clawitzer
• Tyrunt/Tyrantrum

Sources: https://pokemondb.net/ultra-sun-ultra-moon/exclusive + my in-game Pokédex

I have Ultra Sun, so if you would like some help filling your 'Dex, my Friend Code is on my profile! ^w^