I see that when a pokemon with this ability is hit with a physical move, it lowers attack and raises speed. So would a move like Fury Swipes, which hits multiple times, raise speed multiple stages? I know that they normally function on their own, so it could have a chance of working.
DT, you got it all wrong. First its called Breakable Armor and it doesn't Lower Attack, But Defence. And if Fury Swipes are used, the Defense will get lowered each time.