You can't. At least not in Shin Budokai. However, if you pick up Shin Budokai:Another Road for psp and beat story mode 100% you'll unlock ssj4 Goku.
you cant because this was made before goku transformed into grate ape them ssj4 goku aka monkey hair on Shin budokai another road(part two) you have to beat the entire game to unlock him.
no.
press the 1 button
If he becomes super saiyan, yes. He needs goku, gohan, future gohan, goten(adult), goku jr., and raditz too. That will be the true family kamehameha! He also did it only with goku, gohan, goten, and future gohan in Dragonball Z: Shin Budokai Another Road.
at the character select pick the form you want to turn in to. During battle you charge up 4 bars of ki and thhen press down, circle. BBBBBOOOOOOMMMMMMMMMMMM! You are now super saiyan!
some game's like burst limit,budokai1,shin budokai,shin budokai another rode,
no you need to complete the dragon road to unlock them all including powered up forms of the z fighters eg:goku super saiyan 3
yes
you just have to beat every mission it doesnt matter about the score,the end points
they are the same but shin budokai 2 is in usa
no omega shenron isnt in shin budokai
sorry but no because there are,not a lot of characters
there is no vegeta ss4 in dbz shin budokai another road