The Quick claw is located in the National Park in Pokemon Heartgold and Soulsilver.
a quick claw is what you give a Pokemon to increase itsspeed
Quick Claw increases the possiblity of your Pokemon attacking first in battle.
You can get the quick claw in the safari zone.
There is no item that ALWAYS makes your Pokemon go first, but quick claw does let them go first more often.
You get it by getting a life...and not playing Pokemon...