Tekken 3
Fight as Panda:
Highlight Kuma at the character selection screen and press Circle.
Fight as Tiger:
Highlight Eddy at the character selection screen and press Triangle.
Fight as Doctor Boskonovitch:
Complete Tekken Force Mode four times (collect the bronze, silver, gold keys,
then complete that mode one final time). Defeat Doctor Boskonovitch when
he appears to have him available on the character selection screen under
arcade mode.
Fight as Gon:
Complete arcade mode using Doctor Boskonovitch. Then, select arcade mode
and press the D-pad off either side of the character selection screen.
Alternatively, defeat Gon under "Ball mode".
Fight as Anna:
Complete the game with five characters.
Beach ball mini-game:
View all endings of the ten base characters to enable the "Ball Mode" option.