Pokémon: Let’s Go, Pikachu! and Let’s Go, Eevee! have sold three million copies in just one week and have become the fastest selling Nintendo Switch titles since the system’s launch in March of 2017.
Via Gematsu, this feat was announced by The Pokémon Company and shows strong interest in the titles that are part remake of Pokémon Red, Blue, and Yellow, and part hybrid with Pokémon GO.
Source: IGN.com Pokemon Let's Go Pikachu and Eevee Break Switch Sales Record