Street Fighter Alpha 3

Select final battle, go through what you would normally as you were fighting Vega. Right after the 'select speed' screen press and hold all buttons (excluding start button) Gouki's portrait should appear and you'll now fight against him.

Beat the game with a World Tour character that you've entered into the game. Then beat arcade mode with a difficulty of 8 and without continue the game. Once you got that, you can use EX-Vega in arcade, vs., and in training mode by highlight Vega and hold on to start and any button to select him.

Raise a character to level 32 in World Tour mode. When you reach the last stage (in Japan), either win or lose; it doesn't matter as long as you get to the ending credits. Save the game and your character should now have an asterisk (*) next to him/her. Go back and beat the arcade mode with that character without continuing to receive the 6th ISM-Plus, "Guts". This raises all of your stats slightly.

Ryu is the best to get this done with because he has the shoryuken. When Sean throws the basketballs, instead of parrying them, you've got to hit them using the shoryuken (uppercut). You have got to hit all 20 balls. If done correctly, there should be a "PERFECT" in red with 20,000 points.

At the character select screen, select Gouki, hold START, and press an action button to choose Shin Gouki. Shin Gouki moves faster, has a double air fireball (4x in V-ism when a combo is active!), and juggles opponents more easily.

At the character select screen, highlight Akuma, hold start, and press A.

Score more than 3,000,000 points in WorldTour mode. After the final battles against Juli/Juni and Shin Vega, you'll get to "GOKUENTOU" island where you'll face your toughest battles yet! Good luck!