Street Fighter EX 3

Fight as Evil Ryu:
Successfully complete the game in original mode as Ryu eight times without continuing. Highlight Ryu, then hold Select and press X, Square, or Circle at the character selection screen. 

Fight as Bison II:
Successfully complete the game in original mode as M.Bison eight times without continuing. Highlight M.Bison, then hold Select and press X, Square, or Circle at the character selection screen. 

Fight as Dark Kairi:
Highlight Zangief at the character selection screen then press Down/Left.

Fight as Evil Ryu:
Get all ten gold medals in original mode. Highlight Ryu, then press Select at the character selection screen.

Alternately, successfully complete the game eight times under the medium or hard difficulty settings as Ryu. Highlight Ryu and hold Select to play as Evil Ryu.

Fight as Vega II:
Get all ten silver medals in original mode. Highlight Vega, then press Select at the character selection screen.

Fight as True Vega:
Get all ten platinum medals in original mode. True Vega will be unlocked in arena mode.

Hidden characters:
Complete original mode with a regular character without continuing under the normal or hard difficulty setting to unlock one of the hidden characters. Another character will be unlocked each time the game is completed, in the following order: Sagat, Vega, Garuda, Shadow Geist, Kairi, Pullum, Area, Darun, and Vulcano. Note: A different character must be used to complete the game to unlock a new hidden character.

Alternate costumes:
Press X, Circle, or Square to choose a different costume for that character. Circle is main costume, and X and Square are alternate colors. 

In-game reset:
Hold R1 + R2 + L1 + L2 and press Select + Start during game play.

Fight against Bison II:
On original mode, get a full team of girls. On the final battle you will have a choice of fighting Bison or Bison II.

Fight against Evil Ryu:
Win all matches in original mode with a Meteo Combo, Meteo Tag Combo, or Character Parade as Sagat, Ken, Sakura, Vega, or Vega II.

Fight against Kairi:
Win all matches in original mode with a Meteo Combo, Meteo Tag Combo, or Character Parade as Hokuto or Nanase.

Fight against Shadow Geist:
Win all matches in original mode with a Meteo Combo, Meteo Tag Combo, or Character Parade as Skullomania or Sharon.

Fight against Vega II:
Win all matches in original mode under the normal difficulty setting with a Meteo Combo, Meteo Tag Combo, or Character Parade using no continues. You must also have over 500,000 points You will fight Vega II in the last match in original mode. Alternately, win all matches using no continues under the hard difficulty setting.

Narrator Sakura:
Successfully complete the game in original mode as Sakura eight times without continuing. Highlight Sakura, then press Select at the character selection screen. Alternately, get all ten bronze medals in original mode.

Rainbow team combo:
Press Down, Down/Right, Right four times and press Tag to create a Rainbow Flash team combo. Note: Your partner will not stay in and all the moves you do will be the ones that your friend does.

Ryu's secret move:
Press Down, Down/Left, Left (quarter-circle going back), PPP and he will dash back.

Skullomania's secret move:
Press Low Punch(2), Back, Low Kick, High Punch. Skullomania will do a different Skullo Dream. There is a part with Skullomania and the enemy eating something at a Japanese table.

To do a faster Skullo Dream, press Low Punch(2), Down, Low Kick, High Punch.

Alternate M.Bison level:
Fight through the game with any street fighter (original mode) without anyone joining your team. The last level will be darker.

Meteor Tags combos:
These combos can only be performed with certain combinations of characters. They require a Tag Gauge and a level 3 Super Combo Gauge. Here are some of the characters combinations with their moves. The commands are listed assuming the characters are facing to the right.

Tag Team: Zangief and Darun Mister
Character who performs the move: Any of them
Combo: A 360° Motion two times + KKK.

Tag Team: Ryu and Ken
Character who performs the move: Ken
Combo: Quarter Circle Back two times + PPP.

Tag Team: Chun-Li and Guile
Character who performs the move: Guile
Combo: Hold Back (Charge), Forward, Back, Forward + PPP.

Tag Team: Ryu and Sakura
Character who performs the move: Sakura
Combo: Low Punch, Low Punch, Back, Low Kick, High Punch.

Tag Team: Nanase and Hokuto
Character who performs the move: Nanase
Combo: Low Punch, Low Punch, Back, Low Kick, High Punch.

Tag Team: Kairi and Hokuto
Character who performs the move: Hokuto
Before you perform the command with her, you must do her Kakusei (Trance) first. The move is Quarter Circle Forward two times + K.
Combo: Low Punch, Low Punch, Back, Low Kick, High Punch.

Tag Team: Blanka and Dhalsim
Character who performs the move: Blanka
Combo: Hold Back (charge), Forward, Back, Forward + PPP.

Tag Team: Jack and Vulcano Rosso
Character who performs the move: Jack
Combo: Hold Back (charge), Forward, Back, Forward + PPP.

Tag Team: Pullum Puruna and Darun Mister
Character who performs the move: Pullum Puruna
Combo: Quarter Circle Back two times + PPP.

Tag Team: Vega and M .Bison
Combo: Back, Forward, Back, Forward + KKK

Hint: Defeating Bison II:
Play as Blanka and press Square + Away (Electric).

Street Fighter EX3 - supercomputer, Meteor, Meteor Tagme combo collection