how do you get ss4 goku

Finish the game without any failures....

GOOD LUCK!!

Beat the game and then go to chpt.2 and choose to go to Korin tower.Finish first mission and then on 2nd mission let Dabura destroy the Western Capital.There will be a bottom bar in which we have to go to ask help from future gohan and pikkon.The mission of that bar would be that all of your warriors must not lose the battle.Complete that mission and you'll have gokus Super Saiyan 4 transformation

I got him on the last level but I did not complete any of the missions but I healed the cities to 100 and defeated all the guys.

Complete the to chain missions then kill kid buu without getting any damage or just try to get the A rank at the rectangular box

If you want ss4 goku then defeat kid buu at end of the 7th chapter(kid buu not super buu) with a z,a or b rank. I specifically recommend kid buu as yourself

It's only getting B on very last chaper I'm 100 percent sure on kid buu level I'm only 30 percent complete in store city DF is 67 percent tip go after teen gohan piccolo vegeta first give one sensu to each partner run after kid buu as fast as possible once they show find your spam combo mine was running in circles around them with gogeta and using attack combo back circle make sure stats are high in health and middle is whatever you use in majority ult. Atk. Special attack of and high defense too Good luck!!!!