Street Fighter Alpha 2

Australia stage:
Select versus mode. Highlight Sagat at the stage selection screen. Hold Start for five seconds and press any button.
Information in this section was contributed by Matt.

Alternate costumes:
Quickly press L, Y, B while selecting any fighter at the character selections screen.
Information in this section was contributed by Nicholas Bryditzki.

Fight as Chun Li in Street Fighter 2 outfit:
Enter the character selection screen. Highlight Chun Li. Hold Start for five seconds and press any button. Alternatively, highlight Chun-Li on the character selection screen, hold Start, and press A + B + X.

Fight against Shin Akuma:
Complete the game without using a continue or losing a round with five or more perfect victories. Shin Akuma will appear before the final Boss.

Victory pose select:
Defeat your opponent and hold Start + Select with any button.

Hint: Demon rage:
Everybody has the Demon Rage technique. You can flash and charge and make up your combo.
Information in this section was contributed by Nicholas Bryditzki.

Hint: Rose Time Freeze:
Do any Soul Spark and when it hits your opponent follow up with any super move, except the illusion. The screen become a little darker and your opponent will pause until hit. To make your opponent move again, perform another super or custom move. When finishing your opponent with the time freeze, the screen will get darker except for the fighters. Note: Sometimes the game will freeze and require a reset.
Information in this section was contributed by T Master.

Hint: Silent kick:
To execute a silent kick, press Down before kicking. Note: This only works in the air.
Information in this section was contributed by RunMRC.

Hint: Akuma: Quick Super Level 1 Air Haduken:
When you have at least a level 1 super bar, hold any Punch, and press Down, Down/Forward, Down, Down/Forward, Forward, Up/Forward, and release Punch.
Information in this section was contributed by Kendrick Childers.

Glitch: Hit the air:
Alpha counter a two-in-one combo and it will hit the air and not your opponent. For example, do a trip, whirlwind kick combo and the enemy can alpha counter the hit and hit the air. This is a very useful method to beat Shin Akuma.
Information in this section was contributed by Nicholas Bryditzki.