We have bad news for those wanting to know how to catch Shaymin in Pokémon Brilliant Diamond and Pokémon Shining Pearl. As with the original Pokémon Platinum game for Nintendo DS, you will need Oak’s Letter to be able to catch the Grass-type Mythical Pokémon in the Nintendo Switch exclusives. However, there is no legitimate way to obtain this in-game at the moment.
The Pokémon Company International has not announced its plans yet, but we expect that they will run a Mystery Gift distribution event that will reward you with Oak’s Letter so that you will be able to add the white hedgehog-like Mythical Pokémon to your team.
In Pokémon Platinum, the event-exclusive Key Item was handed to the player by the deliveryman at a Poké Mart. In Oak’s Letter, the renowned Professor from the Kanto region asked you to meet him on Route 224. After showing you a white-coloured stone where everyone leaves a note expressing what they are most thankful for, the Seakbreak Path will open and a Shaymin will appear before wandering off to the Flower Paradise.
It is at this location where you will be able to catch the Gratitude Pokémon, but, at this time, you will be unable to do so without exploiting glitches in the game. However, once you have eventually caught one in the future, you will then be able to speak to a lady in Floaroma Town to receive a Gracidea Flower that can change Shaymin into its Sky Forme.
Pokémon Brilliant Diamond and Pokémon Shining Pearl are now available exclusively for Nintendo Switch worldwide.