I need to get Hidden power fighting for my Sigilyph. however i have never used Hidden power before and dont know how it works.
It is very complicated, this should explain it: http://bulbapedia.bulbagarden.net/wiki/Hidden_Power_calculation
I hope I helped. :)
Also if you know its stats and EVs at level 100 or 50 you can calculate IVs and Hidden-power here: http://www.serebii.net/games/iv-calcdp.shtml