In the first three versions of Street Fighter II, "World Warrior", "Champion Edition" and "Hyper Fighting", Ryu and Ken's Hadoken sprites would sometimes appear orange. Developer Akira Nishitani confirmed that this was added as an Easter egg, and wasn't a glitch as previously thought.

In later versions of the game, starting with "Super Street Fighter II: The New Challengers", Ryu would receive a legitimate orange Hadoken special move called "Shakunetsu Hadoken"