Get 999% in Z Campaign Mode:
     At  the end of a episode when the Z Ranking screen is shown press
and  hold Select + Triangle + Square + X . Let go of the 4 buttons and
press  Up or Down to change your rank. Put the Z rank at 999% to get a
special ending

Special SS Gokou:
     To get the super strong Super Saiyan Son Gokou durring the FREEZA
FIGHT(wich  normaly  you can't) all you have to do is make Krillen and
Gokou  fighting. You control Krillen. Have krillen lose three times(so
he  is  DEAD!)  Then  after Krillen dies, Gokou will turn into specail
super saiyan gokou. Specail Super Saiyan Gokou is a Super Saiyan Gokou
who  you  can only be in the Freeza fight. He is stronger then normal,
and  has  a specail yellow fire power up flame. Also this Gokou can do
the  one attack he can only do here, a specail yellow hand kamehameha!
Only then can he do the yellow full hand kamehameha.

Get All 35 Characters in VS mode:
     To  access  all  35 characters in VS mode, you have to finish the
game.  Like  in  DBZ:  GT, the characters will appear in VS mode right
after  you  finish  the  game and cannot be saved in a memory card. So
once  you  turn it off, the characters are gone and you have to finish
the game over again.