SS4 Goku
Beat the entire game and you will unlock SS4 Goku.

Unlockable Cast/Characters

Adult Gohan (Mystic Form)	Beat Vegeta in Chapter 4 - A-B 5
Adult Gohan (Super Saiyan 2 Form)	Beat Broly in Chapter 2 - 6
Adult Gohan (Super Saiyan Form)	Beat Frieza in Chapter 1 - 8
Bardock	Beat bardock as Goku in Chapter 5
Broly (Legendary Super Saiyan Form)	Beat Frieza in Chapter 4 - A-B 6
Cell (Super Perfect Form)	Beat Cell in Chapter 2 - 5
Cooler (Final Form)	Beat Pikkon in Chapter 4 - B-A 5
Frieza (100% Full Power Form)	Beat Frieza in Chapter 3 - 2
Future Trunks (Super Saiyan Form)	Beat Gotenks in Chapter 4 - 2
Goku (Kaioken Form)	Beat Krillin in Chapter 1 - 2
Goku (Super Saiyan 2 Form)	Beat Fake Goku in Chapter 2 - 2
Goku (Super Saiyan 3 Form)	Beat Vegeta in Chapter 3 - 7
Goku (Super Saiyan Form)	Beat Janemba in Chapter 1 - 9
Goku SS3	Beat Majin Vegeta in Chapter 3
Gotenks	Beat Gotenks in Chapter 1 - 4
Gotenks (Super Saiyan 3 Form)	Beat Cell in Chapter 3 - A-4
Gotenks (Super Saiyan Form)	Beat Gotenks in Chapter 1 - 5
Janemba	Finish the Story Mode
Krillin (Unlock Potential Form)	Beat Goku in Chapter 5 - 1
Piccolo (Fuse with Kami Form)	Beat Cell in Chapter 2 - 1
Pikkon	Beat Janemba in Chapter 2- 9
Teen Gohan (Super Saiyan 2 Form)	Beat Teen Gohan in Chapter 3 - 9
Teen Gohan (Super Saiyan Form)	Beat Cell in Chapter 3 - 8
Vegeta (Majin Form)	Beat Vegeta in Chapter 4 - 7
Vegeta (Super Saiyan 2 Form)	Beat Janemba in Chapter 2 - 7
Vegeta (Super Saiyan Form)	Beat #18 in Chapter 2 - 3
Vegeto and Gogeta	Beat the last chapter choosing either path
Vegetto (Super Saiyan Form)	Beat Kid Buu in Chapter 5 - B-9
Vegetto (on all modes)	Beat super buu on chapter 6 bottom path