You can just walk there from Opelucid, however you must have completed the game first, ie, been entered into the Hall of Fame at the league. That will let you access Twist Mountain to enter Icirrus from the west, and unblock Tubeline Bridge allowing you to get from route 9 to route 8 and Icirrus' east entrance.
Yes, you must pass through Twist Mountain, to get to Icirrus City and the 7th Gym.
it is next to icirrus city's Pokemon center.
Icirrus city pokemart - cost 70000
The gentlemen in the corner of Icirrus City Pokemon Center buys the shard.
go into one of the houses and talk to the man show him your basic Pokemon and he'll give you an exp. share.
Pass the rain puddles and go to Route 8. Follow Route 8 to the Tubeline Bridge.
You can find Shelmet in route 8, Icirrus city, and The Moor of Icirrus.
go through tubeline bridge
in castelia city/ icirrus city
Yes, you must pass through Twist Mountain, to get to Icirrus City and the 7th Gym.
You can get it in Icirrus City.
Shop in Icirrus city
You ca only get it in the winter in Mistrilton Cave, Route 7, Twist Mountain, Icirrus City, or Route 8. I got mine in Icirrus City
You have to go through twisted mountain on the west side
There is one in Castelia City and one in Icirrus City.
it is next to icirrus city's Pokemon center.
Icirrus city Pokemon center.