Vegeta (SSJ4) - Defeat Goku as SSJ4 Vegeta once you find him during Vegeta's second playthrough before you fight Kid Buu.

Vegeta - Defeat him as Goku in Dragon Universe.

Uub - Defeat him at the World Martial Arts Tournament Arena if you finish off Kid Buu with the Super Spirit Bomb during Goku's Story.

Supreme Kai - Follow the Dragon Universe directions I put in for him for Adult Gohan's Story.

Super Buu - Defeat him as Goku during Dragon Universe.

Saibaman - Defeat Nappa when he Breaks In during Dragon Arena.Recoome - Defeat him as Goku in Dragon Universe.Omega Shenron - When you're invited to fight Gotenks at the World Tournament, defeat him and you'll unlock Omega Shenron.Majin Buu - Defeat him as Goku in Dragon Universe.Kid Trunks - Defeat him as Vegeta in Dragon Universe.Kid Goku - During Goku's second playthrough, check the water near Grandpa Gohan's House to find him or complete Broly's Story.Kid Buu - Defeat him as Goku in Dragon Universe.Hercule - Find him at the Desert during Piccolo's Story and then head to Central City and talk to Videl.Great Saiyaman - Defeat Adult Gohan's Story.Gotenks - Buy his Capsule at the Skill Shop.Goten - Defeat him as Adult Gohan in Dragon Universe.Goku (SSJ4) - During Goku's playthrough, defeat Kid Buu with the Super Spirit Bomb and when the story continues, head to the islands next to the marker and enter the ? you see.Gogeta Capsule - On the second playthrough of either Goku or Vegeta, you'll receive a invitation from their sons to fight them instead of Broly or Uub.Gogeta (SSJ4) - During Vegeta's second playthrough, instead of fighting Kid Buu, seek out SSJ4 Goku and you'll unlock him.Beat him and you'll unlock Gogeta (SSJ2). Gogeta (SSJ2) - Once you defeat Broly in Dragon Universe, you'll get a invitation to fight Gotenks at the World Martial Arts Tournament.Frieza - Defeat him as Goku in Dragon Universe.Fat Buu - Defeat him as Goku in Dragon Universe.Gero - Defeat him as Yamcha in Dragon Universe. Dabura - Defeat him as Adult Gohan in Dragon Universe.Cooler - Defeat Cooler on Goku's second playthrough instead of fighting Frieza a second time.Defeat Piccolo when he Breaks In during your fight in Dragon Arena. Cell - Defeat him as Teen Gohan in Dragon Universe.

Ssj4 goku budokai 3