after Goku and organization had become the strongest on this planet, they turned to extraterrestrial opponents including the Saiyans (サイヤ人, Saiya-jin); and Goku himself was retconned from an Earthling to a https://bili789.com/%E0%B8%A1%E0%B8%B1%E0%B8%87%E0%B8%81%E0%B8%A389/