yes its mystery stone not egg mystery stone
and has anyone tried this?
notre do not listen it wsant from me. i dont know if its real or not to the amrican version.
Beat elite 4, 8 times in jotho. Catch all Pokemon except celebi and go to proffesor oak.
He will give you a diploma, give the diploma to proffesor elm, and he will tell you to go to the tower where you catch HO-OH.
There you will meet a proffesor which gives you the GS ball. Bring the ball to celebi shrine.
Put the ball in the celebi shrine by standing in front and press A.
Ten days later, celebi its in the ball. it is at level 15 and knows psychic and razor leaf.