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I have a second 3DS that isn't updated yet. You send me the Yveltal to my updated 3DS, I go offline and put my game in the other 3DS, clone it, profit. ^^
PS: I can hatch your eggs too. Just read your comment on reddit. :D
Oh, tricky, I'll add you and be on in a minute :) I'll respond to you about the eggs on reddit, that way you can have them count for egg flair and such. Thank you!