Bonus characters
Successfully complete the indicated task to unlock the corresponding character. Note: To unlock all characters easier, set the difficulty to the easiest with one round.
Akuma (Gouki): After unlocking all characters except for Akuma, Gouken, and Seth, play Arcade mode with any character you have already completed the game with and the rounds set to one. Get at least one "Perfect" victory, and do not lose a single round to fight Akuma after defeating Seth. Defeat Akuma to unlock him.
Cammy: Successfully complete Arcade mode with Crimson Viper.
Dan: Successfully complete Arcade mode with Sakura.
Fei Long: Successfully complete Arcade mode with Abel.
Gen: Successfully complete Arcade mode with Chun-Li.
Gouken: Successfully complete Arcade mode with Akuma (Gouki). Then, play Arcade mode with any character you have already completed the game with and the rounds set to one. Get at least one "Perfect" victory, three "Ultra" combo finishes, five "First Attack" hits, and do not lose a single round to fight Gouken after defeating Seth. Defeat Gouken to unlock him.
Rose: Successfully complete Arcade mode with M. Bison.
Sakura: Successfully complete Arcade mode with Ryu.
Seth: Successfully complete Arcade mode with all characters, including the bonus characters.
Unlocking characters easily
Start a game in Arcade mode, and set it to the easiest difficulty and one round. With any character, press [Hard Kick] repeatedly. You should defeat the CPU every time. After you have defeated all CPU opponents with every character, all characters except for Akuma and Gouken will be unlocked. To get "Perfects" and "Ultra Finishes" easier to unlock Akuma and Gouken, if a round is not going as desired, press Start on a second controller.
Gallery movies
Successfully complete Arcade mode with a character to unlock his or her prologue and ending movies at the "Gallery" menu.
Zangief, Ryu, Ken, E.Honda, Guile, Chun-Li, and Blanka
Dhalsim, M. Bison, Balrog, Abel, El Fuerte, and Rufus
Sagat, Vega, C.Viper, Sakura, Dan, and Rose
Gouken, Akuma, Cammy, Fei-Long, Gen, and Seth