Street Fighter Anniversary Collection
Get Akuma in Hyper SFII:
Choose Super T Mode. Then hover your selection over Ryu for 1-5 seconds. Do this for T.Hawk, Guile, and Cammy in that order. Then highlight Ryu again and wait for 1-5 seconds again. Press START then immediately hit LP + MP + HP. If the portrait is a black shadow, the code worked.
Extra Costumes in SFIII: Third Strike:
Any character you have beaten the game with will have 6 additional costumes. Hover over a character, hold Start and press any of the six attack buttons for the new ones. The 13th Costume for any character, whether you've beaten the game with him or not, may be chosen by pressing Circle + Square + R1.
Fight Shin Akuma:
In Arcade Mose, choose a Super Street Fighter 2 Turbo character. Regardless of the difficulty, get to M.Bison without losing a round.
Store Moves Mode:
When you are selecting a version of Street Fighter to play, hold START and select "Super Turbo". Then release START and take E.Honda, Vega, or Chun-Li. Now, every time you execute either a special move or super combo, don't press the last kick to perform it. It will be stored so that the next time you press kick, the special move or combo will be unleashed.
Thanks to Revolution readers Carl, Evil_Ken, Scott, and RicoSuave!