No Guard means all attacks made by or against the Pokémon are to hit, even in the invulnerable stages of dive, fly, dig, sky attack, shadow force and even sky drop. Say your Also, Aeigislash has Stance change as its ability, so it doesn't get.the effects of No guard. Yes again, after afew swords dances in sheid form, shadow sneak is A VERY GOOD priority move for it.