Orange Jacket Goku is a reference to the attire worn by Goku during a specific period in the Dragon Ball series. The orange jacket made its debut during the King Piccolo Saga, which is part of the original Dragon Ball anime. Up until this point, Goku primarily wore his traditional gi, which was predominantly blue and featured the Turtle School symbol (Kame-Sennin) on the front. However, when Goku trained under Master Korin, he received the orange jacket as a symbol of his growth and achievement.