All legendary Pokémon that you have not yet caught respawn after you beat the Elite Four.
you're screwed
Kill the police man
yes but you have to beat the elite 4 and ash again
It depends it only will revive if you have action replay
If you fight and beat the elite four and the champion he will reappear, the same as all other legendaries in HG & SS.
Beat the elite Four
kill him!
not a chance
you're screwed
if you kill it you can not battle it again.
use a strong attack like slfdestruct
Kill the police man
yes but you have to beat the elite 4 and ash again
It depends it only will revive if you have action replay
You have to have psycic types that are stronger then his Pokemon ironic how my Meganium did not kill his Poliwarth
The shard of bladestone is a stone that silver skeletons will commonly drop when you kill them.
kill all the trainers then try again.