You go to Petalburg city after you beat the 4th gym.
He has got 2 Slakings and a Vigoroth
It depends on the version. In Pokemon Ruby, Sapphire, and Emerald, the fifth gym leader is Norman. He specializes in using normal type Pokemon and he is your father. His Pokemon are 2 Vigoroth and 1 Slacking.
Should be where you met Wally, in the gym.
Get four badges from other gyms.
it is supposedly lukes father as it is revealed in the platinum version he's a frontier brain. You Welcome
It is the balance badge where you fight Norman(your father) in Petalburg City .
The fifth Gym is in Petalburg against your father.
You have to go back to petalburg city and battle Norman/Your father.
The gym leader in the normal gym, your character's father will give it to you after you beat him.
He is your father back in petalburg city, take fighting types because he has normal type pokemon
Its the battle tower brain Palmer
You can battle him in the battle tower. He's the last in a set of seven.
I think he's dead or he's away. For a very long time.