The Lucky Trinket will expire on Teptember 15. To reach Great Friendship more quickly, you can also increase friendship progress by completing the Weekly Challenge (Party) together.
Please make sure you are able to meet these requirements before purchasing this option to avoid wasting your Lucky Trinket and your money.
-If you have not registered the Shiny form of Kyurem in your Pokédex, this will be an unregistered trade and will cost 1,000,000 Stardust.
-Trade + Use Seller's Lucky Trinket Option: The seller and buyer must interact until they become Great Friends. The trade will be completed on September 5 (when there is no daily GO Points limit), or earlier if the seller receives their Lucky Trinket before then.
If you are not willing to wait until then, please do not purchase this option.