Transforming To Super Saiyan 4 With Goku:

To transform to SS4 with Goku you must first beat the Advanced World Tournament with all characters then oce you have done that you go to character select to choose Goku then when the battle begins accumulate the energy to transform to Super Saiyan and then press the y and x buttons and instead of becoming a Super Saiyan you transform to Super Saiyan 4.This tranfrmation is still the same power as a regular Super Saiyan so there is no change in Goku's power he just looks better.