go to fortree city and battle winona
In sapphire, the 5th gym leader is your dad, in that city after Oakdale.
battle them
The fifth gym leader is actually in an old town that you had visited previously. The fifth gym leader is Norman in Petalburg city. In order to beat him I would bring a good Pokemon with good fighting moves, otherwise you wouldn't survive against Slaking or Vigoroth.
To defeat or "beat" the 7th gym leader in Pokemon sapphire there twins and they have a solrock and a lunatone to beat them I suggest about level 40-50 water types.
uhhh, what game?
beat the fifth gym, talk to Wally's dad in the house next to the gym
Beat the gym leader
The gym leader in the normal gym, your character's father will give it to you after you beat him.
go back to your fathers gym and defeat him
You need to beat the leader Norman (Your father in the game), the 5th gym leader.
Swampert.
with fighting type pokemon