Goku learned Kaioken while preparing for the arrival of the Saiyans (in the anime, in Dragon Ball Z). As expected, since this is a technique created by North Kai, he learned it wh ...

in response to Goku's request for a handicap. No other Saiyan is as intimidating as Broly in his Legendary Super Saiyan form, and the new Broly might have benefited from his predecessor's ...