Which Tekken 3 bonus mode is a volleyball-like minigame?

The Tekken 3 bonus mode that plays like volleyball is Tekken Ball.

Tekken Ball turns a normal fight into a beach-based ball game. Instead of directly attacking the opponent, each player strikes a ball across the arena. Powerful attacks charge the ball with energy, making it more dangerous when it reaches the other side.

A player can be hurt when the energized ball hits them, or when the ball lands in their territory. The mode therefore combines fighting-game timing with positioning and projectile control. Its presentation resembles beach volleyball, but the objective and damage system are distinctly Tekken.

Tekken Ball was added to the PlayStation version of Tekken 3, alongside Tekken Force and additional characters. Tekken Force is a side-scrolling beat-’em-up mode, while Tekken Bowl belongs to a different later extra-mode tradition. Devil Within was introduced in Tekken 5, so neither is the answer here.