the Kaioken doubles the user's base power level, but its true value lies in its ability to stack its effect multiple times. During the battle against Vegeta in the Saiyan Saga, Goku managed to ...

From the time Goku first became a Super Saiyan in the Namek Saga to the arrival of the sagas such as Kaioken Form and, more recently, God Form and Ultra Instinct, each of the forms has contributed ...