back to peltaburg and you face your dad
Wallace. Specializing in water Pokemon the way he did for the Rain Badge in Ruby/Sapphire. In Emerald the Sootopolis Gym Leader is now his mentor Juan.
there is no powerplant in pokemon emerald
ROCK MASH IS IN MAUVILE NEXT TO THE POK'E MART JUST TURN RIGHT AND YOU WILL SEE A HOUSE AND GO INSIDE AND TALK TO THE MAN BUT YOU MUST HAVE THE BADGE OF WATSON'S BADGE BEFORE YOU CAN USE IT...
how did i get in sky pilar in pokemon emerald
at the gym
Go to the Pokemon league.
you battle your father
the ground gym
At lavaridge town
Go beat the 6th gym leader ^^, that is in Fortree City.
go get the gym leader's badge.
Beat the gym leader