If you have to do one thing in your life, you should buy that game.
Gameplay: This is the best point of the game. Now, with the Wii, we can choose 4 ways to play to it; Wii mote+Nunchunk, Wii mote, Gamecube controller and the virtual console controller.
The characters have some new moves like the Final Smash that allow the characters to use a super powerful move to take advantage on the fight. They're also new battle items, new pokémons and now, assitance character. The assitance characters are here to help you to take advantage on the fight. You can call them by using an assistance trophy. There also stickers. Likes trophy, you collect them.
In Brawl, there's new game mode like Subspace emissary, a story mode, and a boss battles mode. You can also try the masterpiece games of Nintendo like Mario Bros.1 and The legend of Zelda 1. There's also an online mode that I didin't try yet. There's a challenge mode. You can win trophy and others prizes by completing somes conditions.
Story: This version of SSB gives now a story mode that you can't find in the others one. This mode is the Subspace Emissary. The story introduce the characters while you go further in. The story is quite interesting and reminds the world of Nintendo. The fact that the characters say no word put a comedy touch to the game. You can play this mode in Coop with a friend. Here, the stickers are really useful. They are here to boost character capacibility and powers.
Graphics: Compared to the others of the sequel, Brawl acquire graphics revolution. The characters looks better and more real. The visuals effects are totally amazing.
Lifetime: Now, I spent nearly 50 hour, but Ithink this game can pass nearly 100hours of playing. This game is really attractive and immersive.