How do you get to the 7 gym leader?

1. Defeat the previous gym leader, Brycen, in Icirrus City.

2. Go to the Celestial Tower in Opelucid City.

3. Talk to the man at the top of the tower and defeat the three trainers he sends out.

4. Go back downstairs and talk to the woman in the center of the room.

5. She will give you the Twist Mountain Rope and tell you to go to Twist Mountain.

6. Go to Twist Mountain and use the rope to cross the chasm.

7. Follow the path to the end and you will find the seventh gym leader, Elesa.