Well, first you have to pick freeza. Next you have to charge up ypur ki to 100%. Then, get above your opponent and press "R, A, and B" all at the same time and he will use his death ball. If you miss it will go into the planet and a countdown of 45 seconds will start. once the 45 turns to 0, the opponent you are facing will die, but if you are facing a team, the person you were fighting at the time will be the only one that dies. Well I hope this helps.