You go to Mauville city and go west, then go to the beach there and surf.
with fighting type pokemon
normal Pokemon are bad against fighting type get fighting
after you beat your father's gym
beat the 8th gym
Defeat all of the Gym leaders on Emerald. ~KKMG1
Go in. Beat the GYM. THAT SIMPLE
You get it when you battle your dad which is the fifth gym
Get the badges for 1-4 and go back to Petalburg. There is the fifth gym. Your father runs it and he uses Normal type Pokemon.
...you beat the gym leaders
go to slaport :)
get better pokemon
Beat the gym leader