Get a high score on Survival mode, then enter the following as your name:
Password
Effect
GON
Unlock Gon
Tekken 3 Unlockables
Unlock Characters
Tiger-Finish Arcade mode with every character then highlight Eddy and press Start or Triangle
Panda-Highlight Kuma and press o or x
Unlockable
How to Unlock
Kuma
Beat arcade mode once
Julia Chang
Beat arcade mode twice
Gun Jack
Beat arcade mode three times
Mokujin
Beat arcade mode four times
Anna Williams
Beat arcade mode five times
Bryan Fury
Beat arcade mode six times
Heihachi
Beat arade mode seven times
Ogre
Beat arcade mode eight times
True Ogre
Beat arcade mode nine times
Misc. Unlockables
Unlockable
How to Unlock
Jack's Tank Top
Play as Jack 10 times, then select him by pressing Start
Anna's zebra skin costume
Play with Anna 25 times in a row, then select her by pressing Start
Dr. Boskonovitch
Collect the bronze, silver and gold keys in Tekken Force by completing it three times. Then play through it one more time. After you beat the boss of the last stage, you will be taken to an underground cave and defeat Dr. B
Theater Mode
Beat the game in arcade mode with all non-hidden characters
Tekken Ball Mode and Gon
Beat the game with all non-hidden game characters
Jin's School Uniform
Play as Jin 50 times, then select her by pressing Start
Ling's School Uniform
Play as Ling 50 times, then select her by pressing Start
Unlockable characters and modes (alternate method)
These are determined by the number of times you've selected any character (refer to Character Usage, Records, Options menu)
Unlockable
How to Unlock
Kuma
100 matches
Julia
150
Gun Jack
200
Mokujin
250
Anna
300
Bryan
350
Heihachi
400
Ogre
450
True Ogre
500
Tekken Ball Mode
550
Tiger (Eddy alternate)
600
Gon
650
Dr. Bosconovitch
700
Theater Mode, all extra costumes
750
Gon (alternate method)
To unlock Gon, you must beat it in Tekken Ball (it will appear as your first opponent), or in Arcade mode (it appears randomly).
Tekken 3 Secrets
Make Mokujin Sound as a Wooden Block
On Mukujin's picture, hold down until the match begins.
Finishing Poses
After you defeat your opponent press either Triangle, Circle, X Button, or Square and hold it down to see different Finishing Poses.
Tekken and Tekken 2 Videos
While in Theatre mode if you have save data from Tekken or Tekken 2 on your memory card you can view any unlocked FMVs from either game.
Listen to a Song
If you put Tekken 3 into your computer, or a CD player, and go to Track 2, you can listen to a 2:37 song called The King Of Iron Fist Tournament 3: Enter The Tekken.