Tekken Tag Tournament

Fight As Angel:
Beat the Arcade Mode until Devil becomes unlcoked. At the Character select screen, highlight his screen and press Start.

Fight As Tiger:
At the Character select screen, highlight Eddy's screen and press Start.

Gallery Mode:
Unlock Devil to access the gallery mode.

Jukebox:
You can unlock the Jukebox by bowling a score higher than 200 points during a game. Once you've done that you can hit start and access the bowling menu. Now, choose Bowling Options and choose your song.

Knockout Dr. B:
In Tekken Bowl, if you aim at Dr. B. in the background you can hit him and get a K.O.

Secret Characters:
Beat the game to unlock each secret character, which are opened in this order:
Kunimitsu
Bruce Irvin
Jack-2
Lee Chaolan
Wang Jinrey
Roger & Alex
Kuma & Panda
Kazuya Mishima
Ogre
True Ogre
Prototype Jack
Mokujin & Tetsujin
Devil and Angel
Unknown

Start Match With Second Character Selected:
Hold Tag and press Start. Continue holding the "Tag" Button until the match starts.

Tekken Bowl Mode:
Unlock Ogre to access Tekken Bowl Mode.

Theater Mode:
Beat the game one time to unlock the Theater Mode.

Unlock Armor King's Hidden Costume:
Select him as your first character and beat the game in Arcade Mode. Now, you can access his costume by hitting the Start Button.

Unlock Ling's FMV sequences:
To view two FMV sequences featuring Ling, beat the game with Ling one time, then beat the game a second time with Ling in her School uniform.