I dunno much about Video Games, but technically, I don't think you can. For one, as said by goku in the Fusion Saga ( DBZ Majin Buu saga), you have to be the same height. Krillin isn't even as tall as gohan, so that's not possible. He also mentions (i think) that the person has Tobe of the same race. So pure saiyan and PURE earthling don't match. Thridly, the power levels must be the same, and to fight a competent enemy like cell or buu, krillin's puny power and goku's massive power levels won't work, even if goku descends to krillins power level, because then the fused former won't be competent at all! And also there is no such thing as budoki tenkaichi 4.
no.
Goku (End, Mid and Early), Krillin, Gohan (Kid, Teen,Ultimate, Adult and Future) and so on...
No.
Yes there is.
you make item fusion item hatred of goku and legendary super sayin fuse and there you go.
Goku and Vegeta
no why u ask that do u have that game cause i do and there is no Goku jr. on it
Fight senron 5 times and go to the shop and they will have it for only goku
yes there is but he would be under goku (gt)
he only has it when he fought majin vegeta. check super saiyin 2 goku maybe he has it
You have to unlock the gt saga then do the missions until you get it
You have to win on 3 star difficulty in the Yamcha Games. And yes, Fasha is Goku's mom.