Team Battle is a mode that lets you make a team of up to 8 fighters and battle against a friend or computer. After one character is defeated, the next one in line replaces them. Just like in Survival Mode, your character's health slightly increases every time you win a match. Team Battle made it's debut in Tekken 2 and has been in all the games since.
You can randomize all your characters with the press of the stage button, until Tekken 6, where you press the select button to randomize your characters. They all appear as question marks.