If you want the satisfaction of doing it yourself but hate the grind, here is a 2-hour "speed unlock" strategy to get 80% of the roster without a downloaded save:
WWE SmackDown vs Raw 2011 is a fighting game that features a wide range of WWE superstars, including John Cena, The Rock, and CM Punk. The game offers various modes, including Exhibition, SmackDown, Raw, and Universe modes. Players can choose from a diverse roster of superstars and compete in matches to win championships and unlock new content. wwe smackdown vs raw 2011 psp all characters save data