you can;t.
Get an action replay
you have to get a members pass with an action replay
Well without cheating, hacking or trading you can't due to the fact that it is an event pokemon.
with action replay or luck
Action replay
No
no you have to get is from an action replay or go to a Pokemon event
I'm sorry but you cant capture a trainer's Pokemon without an action replay.
you trade it or use action replay
only with action replay!!! there is no way without action replay
you have to migrate or use action replay
No you can not.