Have you completed the chandelure event ? if so , behind the chandelure event is a graveyard the gave straight in front of you will say there is a tunnel underneath you decide to leave it alone, come back with a pokemon with dig and use dig .... then use the ladder to go down and tada you have narcissa's tm
The Ancient wing is used on the kindra statue , you exit sheridan city (east) to route 3 go east as far as you can go then go up , follow the forest around and you will get to the kingdra statue
I believe melia's ID card was obtained after you faught your first red swirly thing its in the dirt there (Amethyst cave)
Exp Share is in the same place as you got your starter except instead of going up the elevators to the proffessors office you head right and use the ID card to enter the room and bingo exp share
here is kristiline help center
http://prntscr.com/6zonhk
-wants a medal xD-