Unlock Spider-Man in Spider Armor as a Playable Character:
Hold 'Start' and highlight Ryu. Then hold Down (now on Spider-Man) and wait for 5 seconds before pressing Jab + Fierce or Short + Roundhouse.

Unlock Mephisto as a Playable Character:
Hold 'Start' and highlight Omega Red. Then hold Down for 5 seconds and press Jab + Fierce or Short + Roundhouse.

Unlock U.S. Agent as a Playable Character:
Hold 'Start' and highlight M. Bison. Then hold Up for 5 seconds and press Jab + Fierce or Short + Roundhouse.

Unlock Shadow Charlie as a Playable Character:
Hold 'Start' and highlight Dhalsim. Then hold Up for 5 seconds and press Jab + Fierce or Short + Roundhouse.

Unlock Mega Zangief as a Playable Character:
Hold 'Start' and highlight Blackheart. Then hold Left for 5 seconds and press Jab + Fierce or Short + Roundhouse.

Unlock Evil Sakura as a Playable Character:
Hold 'Start' and highlight Hulk. Then hold Right for 5 seconds and press Jab + Fierce or Short + Roundhouse.

Change to Second Character:
When you have chosen your character hold Start + Jab + Fierce + Short and release the buttons when the match begins to use your second character.

Attack Opponent After Winning a Match:
When your character has won a match and is doing thier victory pose press 'Start' to continue hitting the defeated character.