Was searching around YouTube earlier about SSBB and I came up to three videos that someone created showing the voices of some of the characters and sound effects from the game. Check them out:

Part 1
Part 2
Part 3

Man, Meta Knight and Lucario sound pretty sweet, in fact is it just me or does Meta Knight sound and talk like Darth Vader? Also, whenever Pokemon Trainer is on, I will be sure to mute my TV, good God does he sound annoying.