Glitches

Try this one use the assist trophie tingle and if it uses the ability to zoom in on your opponent use dragoon and shoot.the camera should stay on the camera you see dragoon hit an opponent.

The User Submitted cheats has good glitches, you should check it out some time if you want to know glitches.

Heres one, throw a smart bomb at giga bowser and he gets stuck until the smartbomb finishes, and when giga jiggly is there, make yoshi swallow giga jigglypuff and jigglypuf will grow twice as size.

Go to training, or put Pokeball as the only usable item on high. Have a custom stage with a spot just like this shown below.
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Drop-through platform

If you are in training, put some Pokeballs, then throw one on top of the drop-through platform. If you are in a match, just do the same. Keep trying until you get a Groudon to come out. When a Groudon appears in that tight spot, it'll be too big to move, and then it'll get stuck. It won't go away, it'll be there forever (or at least until the training or match is over). Hope you have fun with this glitch.

Aw, come on! My diagram didn't show right! Sorry...

well I know one where you can stay as shrunken zelda/shiek till your K.O.ed...
have your opponent touch the Lightning item and become shrunk. You can either switch between shiek and zelda repeatedly till the item wears off or wait till the last second and then transform, either way you end up stuck as a tiny zelda/shiek unless you use super smash or you get K.O.ed.

There is a glitch with yoshi you go on brawl, traing,or wi-fi then go to the temple or other stages then go on the platform on the far left it looks like a house and the tiny part on the roof thats tilted press b and down rapidly and if you do it correctly yoshi will rapidly ground pound

I now of no glitches that hasent been said here sorry......