Bonus Game:
At the Mode select screen, highlight Practice & press Select, Up, Up, Right, Up, Right, Select.

Four More Characters:
Highlight Practice & press Select, Up, Right, Down, Right, Select. A noise will sound to confirm correct entry.

Barrel Bonus Game:
Go to the practice mode and press Select, then quickly press Up, Up, Right, Up, Right, Up, Select. If you did it right a message will say "Here comes a bonus game." Enter practice mode and the new mode will become available.

Save The Bonus Game:
Complete the game in expert mode and gain at least 65535 experience. You will now have the ability to save the bonus game on your memory card.

Options Plus:
To unlock the OPTIONS PLUS setting, complete the game in expert mode.

Play as Powerful Gouki, Vega and Garuda:
Gain enough experience that the three pictures of Couki, Vega and Garuda are highlighted in the expert mode screen. Now go to the character select screen and hold Start while choosing either Gouki, Vega or Garuda.

Taunts:
There are three characters that ha! the ability to taunt their opponent -
Dhalsim:            While in the air press Forward, Forward, Up, Up, Back, Up, Back.
Sakura:               Press Low Kick, Low Kick, Back, Low Punch, High Punch.
Skullomania:    Press Forward, Forward + Down, Down, Back + Down, Back, Back + Up, Up, Forward + Up and any Punch.