Allow one of your weaker characters to die in the final battle against Frieza (Chaozu, Krillin, Yamcha, or Tien). Goku will become enraged transforming him to a super saiyan! His BP will now be 4,999,999! If you give him a sachioro card ,his BP will be 7,999,998! He is now a lot more powerful than Frieza! After you kill Frieza wait for the credits to finish to battle Super Saiyan Vegeta.