Question

If you hack a Thundurus or Tornadus, will that little windstorm or thunderstorm thingy happen?

Comments

What "little windstorm of thunderstorm" thing?

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When you are in the same area as Tornadus or Thundurus there is a violent storm that signals the presence of that pokemon, but only so with those two.

Answer 1

No it will not, being as that only happens in the story mode when they are Roaming, not Post Game when they are not.

Answer 2

No, beacause that storm only happens when they are roaming, if you hack it they aren't roaming.