A YouTube video was uploaded about a week ago that showcased all the Super Smash Bros. Brawl characters' Final Smashes. For those who don't know, the Final Smash is the equivalent of a finisher in other fighting games, and players can use it when they attack the "Smash Ball" item.
This video is most likely accurate since the Japanese version of Brawl has already released. For any interested, all clones have a slightly different version of the regular character's Final Smash excluding Luigi. His is the oddest of all, causing him to attach flowers to all enemies in the area and slowing them down. It's a bit of a drug trip to even watch.