Solid Snake..nuff said. He either does (Zero/Negative Suit Samus) a women, kills things, talks crap, or uses his ***** and whatnot.
There is a Mario and Zelda love scene. Snake and Samus "get dirty" ON SCREEN. Kirby is attracted to Yoshi. Lucas dies. Sonic runs over Donkey Kong, and kills him. Link and Ike kill Pit, the Ice Climbers, and the Pokémon Trainer. And of course, Diddy Kong summons Al Queda to fight! Pichu gets killed by Bowser. Wario farts. A lot. Pikachu is killed by a shot by Fox. Meta Knight is eaten by King Dedede, and comes out slashing him, and King Dedede dies. O, and the big thing as to why Brawl is rated T for Teen is Pichu is in the game. Nuff' said!
Seriously, the"explosions" and stuff, and Snake made it T for Teen. Also the guns, swords, and so on. And it's about punching and crap. Sakurai AIMED for T for Teen on purpose! XD