This must be for BW2-
- Using the Pokemon Dream World.
- Trading using the GTS
That's all. FYI : You can't get it by breeding unless one of the parents has the HA.
- Horde Battles. Not recommended as only a few Pokemon are obtainable in this way. Only a 5% chance.
- Using Friend Safari.
Hope I helped,
gau222 ;) .
Next time give a tag for which Gen. this is for.