When does a Pokemon get a Hidden Ability???

Question

A Pokemon has a Hidden Ability when I catch it on dreamworld.
But does a Pokemon have a Hidden Ability when I put it into sleep, let it go to dreamworld, and wake it up?

Answer 1

No, Pokemon only get their Hidden Abilities when they are either caught in the Dream World or are bred in the daycare having a mother from the DW.

Comments

Also, Pokemon that appear in Dream Radar & Hidden Grottoes will have their Hidden Abilities if they have one.

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But how do you then get a Zapdos with Lightningrod???, it is legendary!!!

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Lightningrod Zapdos isn't legal yet. Without hacking, it is impossible to get; although that doesn't mean all the legendary's Hidden Abilities are not released yet; some are, e. g. Multiscale Lugia, which can be found on Dream Radar.