You people realy need to stop assuming that Lucario is a clone of Mewtwo. It is quite possible and one of the first things I considered when I first thought of him possibly being in the game. Considering that Lucario is fighting type, It is quite likely that is will be more of a phisical hitter in brawl. Also, considering that people who used to be obsessed with Pokemon back in its fad stage and who don't play the Pokemon games anymore would be quite dissapointed at the lack of the inclusion of Mewtwo. Not to mention that Mewtwo is still a god in little kids' eyes (along with Pikachu, Charizard, and others). I doubt that Nintendo would take out such a popular character. Think of what Zelda fans would do if they took out Link.