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First I go to the daycare and deposit a female of whatever I'm trying to get, and a male that's in the same egg group. Alternatively I'll deposit a Ditto with whatever I want to get. Then I bike/ride Stoutland until the daycare worker tells me my pokemon had an egg. I collect the egg with something that has either the Magma body or Flame body ability in my party and keep riding around until it hatches.