Secret record mode
Go to practice mode and choose 1P Freestyle. Then on the sub-menu, hold L1 + L2 + R1 + R2 and press Circle. This will take you to the fighting screen where you can use Down and Select to record and playback any moves that you do.

Secret intro
After the intro with Heichi, hold L1 + L2 + R1 + R2 at the screen that says NAMCO the second time.

Alternate winning poses
To view your character's alternate winning pose, hold down one of the kick buttons, during the replay of your win. To view your character's regular winning pose, hold down one of the punch buttons, during the replay of your win. Make sure you hold the button down during the whole replay.
Note: Not all character's have an alternate winning pose.

Play as Kuma
Beat arcade mode with one character.

Play as Juila
Beat arcade mode with two characters.

Play as Gun Jack
Beat arcade mode with three characters.

Play as Mokujin
Beat arcade mode with four characters.

Play as Anna
Beat arcade mode with five characters.

Play as Bryan
Beat arcade mode with six characters.

Play as Heihachi
Beat arcade mode with seven characters.

Play as Ogre
Beat arcade mode with eight characters.

Play as True Ogre
Beat arcade mode with nine characters.

Play as Panda
At the character selection screen, highlight Kuma and press Circle.

Play as Tiger
At the character selection screen, highlight Eddy and press Triangle.

Play as Doctor Boskonovitch
Beat Tekken Force Mode four times (collect the bronze, silver, gold keys, then complete that mode one final time). Now Doctor B. will be available in arcade mode.

Play as Gon
Beat arcade mode using Doctor Boskonovitch. Then at the arcade mode screen, press the D-pad off either side of the character selection screen. Another way to play as Gon is to defeat him in "Ball mode".

Beach ball mini-game
View all ten base characters endings to enable the "Ball Mode" option.

Theatre mode
Unlock all character, including Panda, Tiger, Doctor Boskonovitch, and Gon, and view their endings. The "Disc" and "Sound" options under "Theatre Mode" will now be available.

Alternate introduction sequence
Beat the game with the ten base characters to view an alternate introduction featuring the characters in their two-player mode costumes. For another alternate introduction, beat the game with all characters including the secret characters.

Alternate costumes
Play as one of the following character the indicated number of times. Then, highlight that fighter on the character selection screen and press Start: Xiaoyu's (50 times), Jin (50 times), Anna (25 times), Gunjack (10 times).