Warning : The migration will only work in PC or Labtop

if Pokemon Nebula 1 & 2 are complete then you can import your old pokemon

to Pokemon Nebula 3 in the postgame.

-The Completion of the main story 

 Rewards: Any starter from Kanto to Galar

-The Completion of the final challenge

 Rewards: Cosmog egg

Rewards for the completion of Pokemon Nebula 2:

-The Completion of the main story 

 Rewards: The starters of Nebula 2

-The Completion of the final challenge

 Rewards: Kubfu egg

-The Completion of the postgame

 Rewards: Spiritmist egg