You catch Pokemon there, like Stunfisk. There are also several hidden items which you can find using the dowsing tool. Lastly, when Keldeo has been obtained (the event has not happened yet though) take it there along with Cobalion, Terrakion and Virizion, to let Keldeo learn Sacred Sword.
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.
by making it happy u can check how happy it is in icirrus city at the fan club
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.
You can find Shelmet in route 8, Icirrus city, and The Moor of Icirrus.
In moor of Icirrus and talk to the stumps and then snivy comes out then you battle.
You can get Palpitoad by ether evolving Tympole* or finding it in Icirrus City, Route 8, or Moor of Icirrus in all seasons except for Winter *Tympole is in Pinwheel Forest
it is next to icirrus city's Pokemon center.
Shop in Icirrus city
Keldeo is not available in the Moor of Icirrus because it can't be found in-game.
in castelia city/ icirrus city
You can't catch keldeo in the moor belive me i tried it did't work
Route 6, 11 (All), Route 8, Icirrus City, Moor of Iccirus (Spring, Summer, Autumn)
Icirrus city pokemart - cost 70000
The gentlemen in the corner of Icirrus City Pokemon Center buys the shard.
There is one in Castelia City and one in Icirrus City.