How to change Rotom phone cases and unlock save bonus cases in Pokémon Scarlet and Violet
You can unlock specials Pokémon Scarlet and Violet phone cases Rotom for those who have played other mainline pokemon games.
These Rotom Phone cases that you can collect in Pokémon Scarlet and Violet each have a theme from a different game. Unlocking them in-game is pretty simple, though you’ll need to play for a couple of hours before you can claim your rewards.
This is how all savings bonds work, and switch rotom phone cases when you unlock them.