To get a Phione, you need to follow the instructions in the section above to obtain a Manaphy egg and then hatch the Manaphy inside. Next, you need to catch a Ditto if you don't have one already.

Getting Manaphy Egg in Pokemon Brilliant Diamond & Shining Pearl. To get your Manaphy Egg, you’ll need to use the Mystery Gift function in the game and select the ‘Get via Internet’ option ...

The Mystery Gift function will take approximately two hours of play time to access. Players will be able to retrieve the Manaphy preorder bonus egg until February 21, 2022. You’ll need an ...