What is the name of the final boss in Tekken 3?

The final boss in Tekken 3 is True Ogre. He is the transformed second form of Ogre, the ancient fighting deity who serves as the game's primary supernatural antagonist.

Near the end of the King of Iron Fist Tournament 3, Paul Phoenix defeats Ogre and leaves believing he has won the tournament. Ogre then changes into True Ogre after absorbing additional power connected to Heihachi Mishima's forces. This transformation turns the apparent final battle into a second confrontation.

Jin Kazama is ultimately reinstated for the tournament's conclusion and faces True Ogre. After defeating him, Jin wins the tournament and avenges the death of his mother, Jun Kazama. The ending then sets up the next stage of the story by revealing more about Jin's Devil Gene and his connection to Kazuya Mishima.

The most common mix-up is answering simply “Ogre.” Ogre is the earlier boss form, while True Ogre is the final transformed opponent in the game's canonical tournament progression. Heihachi is central to the plot but is not Tekken 3's final boss.