How to Get Mewtwo in Pokemon Let's Go - Pokemon: Let's Go, Pikachu! Guide - IGN

Mewtwo is a returning Legendary Pokemon from the original games. In Pokemon Let's Go, you can find Mewtwo in its original location in the endgame dungeon

Mew (Pokémon) - Wikipedia

Silph Co. Head Office - Get the Master Ball - Pokemon: Let's Go

Individual Values (IV's) - Pokemon: Let's Go, Pikachu! Guide - IGN

Elite Four - Indigo Plateau - Pokemon: Let's Go, Pikachu! Guide - IGN

How to Get Mewtwo in Pokemon Let's Go - Pokemon: Let's Go, Pikachu

Charmeleon - Pokemon: Let's Go, Pikachu! Guide - IGN

Pokemon Let's Go, How To Catch Mewtwo Guide & Location

Celadon City - Gym Leader Erika - Team Rocket Hideout - Pokemon

Route 9 - Pokemon: Let's Go, Pikachu! Guide - IGN