Voldemort mostly uses the Unforgivable Curses, but Goku's ability to move at blinding speed would cause all of Voldemort's magic to miss. Voldemort can at least summon Fiendfyre for help, but no matter what form the Fiendfyre takes, it can never beat Goku in a race, so Goku would definitely win.
Super Saiyan 2 goku cause he was able to defeat Broly as a Super Saiyan 1
Goku.
Gohan is stronger if goku is in his normal form but if they are both in super saiyan 2 form or if Goku is in super saiyan form then goku is stronger.
goku super saiyan would win for sure.
Gogeta, the fusion of super saiyan 4 Goku and Vegeta.
~sigh~ NO THERE WON'T BE SUPER SAIYAN 5 GOKU if he wasn't super saiyan 5 in the series then why would it be in the game?
Goku does not turn super saiyan 6 or 5 in fact. and it only goes up to super saiyan 3 in the manga and super saiyan 4 in the cartoon.
goku ssj 3
super saiyan 3 goku, have u even seen his flowing golden mane and blue eyes?
Goku can go up to Super Saiyan 4 there is no DB AF.
Yes each super saiyan stage is stronger than the previous for example super saiyan 2 goku is stronger than super saiyan goku although the second stage is slower than the first stage power wise it's an improvement super siayan 3 is stronger than 2 and faster as well super saiyan 4 goku is the fastest super saiyan form (of goku only not counting fusion with vegeta) and is the last duper saiyan stage goku reaches.
There is no Super Saiyan 5 it is limited to 4.