first,get ready with some sitrus berries , at least ten.next you will need your strongest Pokemon.and some hyper potions , at least 10.and some revives.first you keep going forward until you see a...
ez. you need to beat all 8 gyms then you go surf there, then you use waterfall there. Use waterfall from the hm that you got from the cave or origion i recommend you use a goldeen, a sharpedo or any...