is ditto in let's go eevee?
One of the more elusive Pokémon in Pokémon: Let's Go, Pikachu! and Eevee! is Ditto. ... The other area you can find Ditto in the games is in the post-game area, Cerulean Cave. Ditto can be found in any part of this cave, but only has a 5% spawn rate, so you'll probably have more luck at the Pokémon Mansion.