You can find the Galactic Grunts at the top of Mt. Coronet. You will then fight 2 of the galactic commanders. You will fight them with Barry. Then, you enter the distortion world.
battle them i guess
When you get to the ruins
you have to beat team galactic at their HQ
mt. cornet
Sorry if i get this wrong but i think mt. cornet
You go to the spear pillar at the top of Mt. Cornet and confront Cyrus and the team galactic grunts. Then you must confront the awakened legendary pokemon. Once defeated or captured Sunyshore city would be opened to you.
you dont need them to
the one beside celestic town
you go to Mt. cornet and catch the Legdenary
They are right at the top trying to slow you down.
You have to beat the gym leader then you face them. If u win they Will let you by
get to the top of mt. cornet and you battle team galactic then go into the reverse world