Let's Go limits the roster to the original 151 Kanto Pokemon plus Alolan forms and Meltan. No abilities, no held items, and wild battles are replaced with Pokemon GO catching mechanics. Your partner Pikachu or Eevee has boosted stats and exclusive multi-type moves. AVs from candy can push any Pokemon's stats higher.
Bulbasaur
Ivysaur
Venusaur
Charmander
Charmeleon
Charizard
Squirtle
Wartortle
Blastoise
Caterpie
Metapod
Butterfree
Weedle
Kakuna
Beedrill
Pidgey
Pidgeotto
Pidgeot
Rattata
Raticate
Spearow
Fearow
Ekans
Arbok
Pikachu
Raichu
Sandshrew
Sandslash
Nidoran♀ (female)
Nidorina
Nidoqueen
Nidoran♂ (male)
Nidorino
Nidoking
Clefairy
Clefable
Vulpix
Ninetales
Jigglypuff
Wigglytuff
Zubat
Golbat
Oddish
Gloom
Vileplume
Paras
Parasect
Venonat
Wild Pokemon appear in the overworld (no random encounters). You catch them using motion controls or button presses, Pokemon GO style, without battling. Abilities and held items don't exist. Candy boosts AVs (a stat system separate from IVs and EVs). Your partner Pikachu or Eevee can't evolve but has boosted stats and exclusive moves.
Partner Eevee is stronger than Partner Pikachu. Eevee gets exclusive moves covering 8 types (Water, Fire, Electric, Psychic, Dark, Fairy, Grass, Ice) while Pikachu only covers 3 (Electric, Water, Flying). Both have boosted stats that outclass everything else in the game. Version exclusives are minor beyond the partner.
Yes. You can send Gen 1 Pokemon from Pokemon GO to Let's Go via the GO Park in Fuchsia City. Alolan forms transfer too. Transferred Pokemon need to be recaught in the GO Park. Meltan only appears in Pokemon GO after making a transfer.
Technically Gen 7, but it's a side entry. Nintendo Switch, 2018. Let's Go reimagines Yellow with Pokemon GO catching, co-op play, and stripped-down mechanics. Not considered a traditional mainline game by most fans. Kanto region, 151 roster plus Meltan.
Yes. Venusaur, Charizard, Blastoise, Alakazam, Gengar, Kangaskhan, Pinsir, Gyarados, Aerodactyl, and both Mewtwo forms can Mega Evolve. Mega Stones are obtained postgame.
- Gen IY
Yellow151 Pokemon - Gen IRB

Red & Blue151 Pokemon - Gen IIGS

Gold & Silver251 Pokemon - Gen IIC
Crystal251 Pokemon - Gen IIIRS

Ruby & Sapphire386 Pokemon - Gen IIIFRLG

FireRed & LeafGreen386 Pokemon - Gen IIIE
Emerald386 Pokemon - Gen IVPt
Platinum493 Pokemon - Gen IVHGSS

HeartGold & SoulSilver493 Pokemon - Gen IVDP

Diamond & Pearl493 Pokemon - Gen VBW

Black & White649 Pokemon - Gen VB2W2

Black 2 & White 2649 Pokemon - Gen VIXY

X & Y721 Pokemon - Gen VIORAS

Omega Ruby & Alpha Sapphire721 Pokemon - Gen VIIUSUM

Ultra Sun & Ultra Moon807 Pokemon - Gen VIISM

Sun & Moon802 Pokemon - Gen VIILGPE

Let's Go Pikachu & Eevee153 Pokemon - Gen VIIISwSh

Sword & Shield664 Pokemon - Gen VIIIPLA
Legends: Arceus242 Pokemon - Gen VIIIBDSP

Brilliant Diamond & Shining Pearl493 Pokemon - Gen IXSV

Scarlet & Violet733 Pokemon - Gen IXLZA
Legends: Z-A364 Pokemon - Gen XWW

Winds & Waves51 Pokemon