Wow, this post is awesome :D
And for my first message in smashboards, i will say a little situational glitch.
First you need to be Zelda/Sheik and play a match in Hal Berd stage. The glitch can be done when the flying platform arrives to the ship´s deck. When the lower platform is about to go into the deck´s surface, use Transformation (you know, Down+B).
If done right, Zelda/Sheik will not be pushed upwards by the ship´s platform and will remain INSIDE the Hal Berd. Being somewhat completly invincible as long as she is there (she can jump out whenever she wants) Also, she can move from right to left until the limit of the ship, and can attack whit Utilts and Usmash, Din´s Fire, etc.
Well, and that´s it ^^
Oh, and a silly curiosity. You can Falcon Punch MetaKnight while he is in his Tornado attack. As long as Meta´s attack doesn´t hits you first, and if he is in the reach of Falcon´s attack, he will PAWNCH Meta Knight hard! :D
Reeaaally hard to do in real combat. But well. It works. xD