Goku learned Kaioken while preparing for the arrival of the Saiyans (in the anime, in Dragon Ball Z). As expected, since this ...
Dragon Ball Z, the iconic masterpiece by the legendary ... and with the looming threat of two powerful Saiyans arriving in a year, Goku trained under King Kai to master this formidable technique.
With the release of Dragon Ball Daima episode 20 ... This revelation left Goku, Panzy, Bulma, Glorio, and Supreme Kai shocked to their core.