In an interview with Famitsu, Pokémon CEO and President Tsunekazu Ishihara explained why they decided to base the Pokémon Let’s Go games on the classic Game Boy game Pokémon Yellow. Ishihara mentioned the expansion of the idea of walking around with a partner Pokémon was a decision maker. The feature was prominent in both Pokémon Yellow and the mobile game Pokémon GO.

Here is Ishihara’s full explanation:

“In Pokémon GO, you can bring a partner Pokémon with you and walk around with it, but if we go back to where that originated from, we arrive at Pokémon Yellow. In Pokémon: Let’s Go, Pikachu and Pokémon: Let’s Go, Eevee we wanted to expand this component even further. Pikachu is always following Ash around in the anime, and Eevee is popular as well thanks to its ability to involve into many different forms. And as I mentioned before, we want this to be the game that people play after Pokémon GO so since the Pokémon from Pokémon Red, Blue, Green, and Yellow appear in Pokémon GO as well this seemed like a good choice. Based on those things, we decided that Pokémon Yellow would be the perfect choice.”

Ishihara also touched on the concern from core players that Pokémon could lose some of its identity with the Let’s Go games.

“Amongst those who have played the game, there may be some who feel like it has changed. However, we’ve actually been continuously changing the formula for the games since the beginning, and in the end the players have accepted those changes.

Along those lines, this time we are also changing things around, but that’s part of the longstanding tradition of Game Freak and the Pokémon series. We won’t make mistakes with the basics, so please trust us.”