Question: dbxv2 how to get kaioken?
Answer: In order to unlock Kaioken you must play through the Saiyan Saga. In the Parallel Quest, Invade Earth (Parallel Quest 8), you must defeat all of the enemies while also allowing Nappa to survive. This causes you to battle against the revived Goku. If you defeat Goku you may earn the Kaioken reward.