The Pokémon Let's Go, Pikachu & Let's Go, Eevee - Demo Version is a small version of the game. When you load the demo, it will randomly select between Let's Go, Pikachu! & Let's Go, Eevee! and then load up the game giving you a Pikachu or Eevee depending on the version it loads.

In this demo, Professor Oak meets you in Viridian Forest and suggests you do some research in the forest. The forest contains different Pokémon to how they are in the game itself. This demo is not compatible with Pokémon Let's Go, Pikachu! or Let's Go, Eevee! so all Pokémon and items obtained within the demo are not saved. Shiny Pokémon can be found in the demo

This demo was originally run in a roadshow across Europe at various events and in the Let's Go Roadshow in North America. However, in February 2019, it was then released for free on the Nintendo Switch eShop.