This page outlines all the bonuses you can get for playing previous Pokémon games.
As an incentive for making you buy ‘em all, some Pokémon games give you small bonuses for playing a previous game. For example, you can get a Gigantamax or in Pokémon Sword & Shield if you played Pokémon Let’s Go Pikachu or Eevee.
What Bonuses Are Available for Playing Older Pokémon Games?
Rotom Phone Cases
The eligible games include:
|Pokémon Let’s Go or
|Based on a GameBoy Pokémon battle.
|Pokémon Sword or Shield
|Based on the Ball Guy.
|Pokémon Brilliant Diamond or Shining Pearl
|Based on the Pokétch.
|Based on the Arc Phone.
To physically receive the unique phone cases, you should speak to a woman with sunglasses standing in front of the stairs leading to the central plaza, in Mesagoza, the main city of the Paldea region. According to Nintendo, it can take roughly 2 hours to reach her.