Get four badges from other gyms.
It is the balance badge where you fight Norman(your father) in Petalburg City .
At lavaridge town!!!!
Fight Wally who is by the door
Never because match call doesn't exist in sapphire.
Should be where you met Wally, in the gym.
Beat then one at the time
from the fight area to the survival area and you may also migrate from ruby sapphire emerald migrate is to put Pokemon ruby sapphire emerald instead of the cover but you must put 6 Pokemon in the PC in ruby sapphire emerald then select in Pokemon platinum migrate from ruby or sapphire or emelard
The fifth Gym is in Petalburg against your father.
after beating the elite 4 go find it
To up your Pokemon's to 100lv you have to fight the elite 4 100 time ......
Make all your Pokemon past level 57. You will definitely beat him or her then. Good luck!
Pokemon Ruby has Pokemon that Pokemon Sapphire does not and Pokemon Sapphire has Pokemon that Pokemon Ruby does not.