flinching by item

Question

what is the item that couses other pokemon flinching?

Answer 1

Adding onto Linkpower22 answer, king's rock gives a 10% chance of finch chance. It also stack with moves that already give an additional flinch chance like air slash. Pokemon with serene grace actually doubles it the flinch chance already given by the move and king's rock.

-From Smogon

Answer 2

King's Rock, which causes the target of the Holder's move to occasionally flinch.