I finally got the final smash to work!!! :D
Shiek taunts, and and as she taunts characters take a hit that hits everywhere on the stage (Massive hit bawcks lol) this hit does 25 damage, and has very little knockback, no knockback growth, but spikes a little tiny bit.
Then several things happen. Time slows down for everyone except Sheik (Timer item) and in a shrieking blast, everyone becomes tiny as well (lightning item). Sheik finishes the taunt and is free to rampage.
This could back fire in a few ways though! The timer can backfire, so everyone becomes slow (but somehow when this happened, everyone slowed for a bit and once the taunt finished everyone sped up again). And also, the lightning can backfire and make all opponents Giant. (This is only a slight backfire because they are still slow, so you can peck at them like crazy.)
I just realized no one probably cares... sorry for going so off topic.