legendary pokemon from Hoenn region in Johto only accessible if u defeated trainer at Mt. Silver. For Soul Silver it is Groudon for HeartGold it is Kyogre for both it is Rayquaza u get them if u get their orbs and head to embedded tower south of Safari zone there. It is a job for 2 people cause u cant get rayquaza till u send the pokemon from embedded tower to the other game for the jade orb from professor oak and u get the other orbs from Mr. Pokemon.