How do you perform a finisher on Dragon Ball Z budokai 3?

Answer 1

whenever you have a team battle like on your team you have trunks and goten,when you have 3 blast stocks with goten go left and hold 1.You will automaticlly do fusion. or if i'm wrong just pause,skill list left and you have a fusion list.

Answer 2

You have to go into hyper mode then launch your enemy. After you launch your enemy with an attack that can launch people quickly, press the red O button and then you are doing a dragon rush.