you first have to go to the sky pillar and awaken raquaza then go back to sotopolis city (my spelling is bad)watch raquaza stop groudon and kyogre and after that you can go into the 8th gym (the maze is hard and he has strong water types)
go a little bit farther down the route
which gyms
you have to distory the door
You might need to open the door to the 8th gym in Pokémon Ruby, Sapphire and Emerald. To do this you first have to awaken Rayquaza.
wake up raquaza in the sky pillar
The Sootopolis City Gym door is unlocked after you retrieve Rayquaza from the Sky Pillar.
well i forgot
You have to catch Kyogre and Groudon.
This is because you have to go in the cave at the top of the town then the gym will open.
you find raquyza at the sky pilliar
You need the Mauville badge, go to Mauville and fight the gym leader, but you must first fight Wally to get to the door open.
the door will be open after you solve the crisis between kyogre and groudon.
The sixth gym in emerald...is the gym in fortree city....and the leader is winnona...
to open the door of the 7th gym!