Gloom: Vileplume / Bellossom
Poliwhirl: Poliwrath / Politoed
Slowpoke: Slowbro / Slowking
Galarian Slowpoke: Galarian Slowbro / Galarian Slowking
Exeggcute: Exeggutor / Alolan Exeggutor
Cubone: Marowak / Alolan Marowak
Koffing: Weezing / Galarian Weezing
Scyther: Scizor / Kleavor
Eevee: Vaporeon / Jolteon / Flareon / Espeon / Umbreon / Leafeon / Glaceon / Sylveon
Pikachu: Raichu / Alolan Raichu
Quilava: Typhlosion / Hisuian Typhlosion
Tyrogue: Hitmonchan / Hitmonlee / Hitmontop
Wurmple: Silcoon / Cascoon
Kirlia: Gardevoir / Gallade
Nincada: Ninjask + Shedinja
Snorunt: Glalie / Froslass
Clamperl: Huntail / Gorebyss
Burmy: Plant / Sandy / Trash Cloak Wormadam (if female) / Mothim (if male)
Mime Jr.: Mr. Mime / Galarian Mr. Mime
Dewott: Samurott / Hisuian Samurott
Petilil: Lilligant / Hisuian Lilligant
Rufflet: Braviary / Hisuian Braviary
Goomy: Sliggoo / Hisuian Goodra
Bergmite: Avalugg / Hisuian Avalugg
Dartrix: Decidueye / Hisuian Decidueye
Rockruff: Midday / Midnight / Dusk Lycanroc
Cosmoem: Solgaleo / Lunala
Applin: Flapple / Appletun
Toxel: Amped / Low Key Toxtricity
Kubfu: Rapid Strike / Single Strike Urshifu
Charcadet: Amarouge / Ceruledge
Source
Hope I helped!
