A glitch that was recently discovered in Super Smash Brothers Brawl is gliding with Pit, Meta Knight, and Charizard.
It's pretty simple, and you can even go under stages like Final Destination, Battlefield, and Hyrule Temple.
What you have to do is jump, then hold down on the jump button. The jump button is different for every controller, though I'm hoping that you know which button is the jump button :D
So hold the jump button and you'll start gliding, holding up and back will tilt you upwards, while down and forward will tilt you down.
Be careful when you use this, though, you can only do it in one direction, you'll fall if you try to change direction.
Hope this helps Pokemon Trainer, Pit, and Meta Knight fans! Happy gliding :D