An imperfectly executed Shin Shoryuken/Metsu Shoryuken resembles the Forbidden Shoryuken, but does not have the same killing potential.
XMEN VS STREET FIGHTER SHORYUKEN WIKI SERIES
![xmen vs street fighter shoryuken wiki xmen vs street fighter shoryuken wiki](https://static.wikia.nocookie.net/streetfighter/images/d/d4/SFA3MetsuShoryuken.gif)
In the games narrative, Shoryuken is an assasination technique created by Goutetsu. Metsu Shoryuken also involves a knee kick after the initial uppercut to the jaw.
![xmen vs street fighter shoryuken wiki xmen vs street fighter shoryuken wiki](https://static.wikia.nocookie.net/streetfighter/images/b/ba/Sean_shoryuken.gif)
This is also shown in Street Fighter III's version of Shin Shoryuken. Some sources state that it involves the fist -> knee -> elbow as the move hits 3 times in original Street Fighter. If all 3 hits land it will knock out the opponent without fail. In the original Street Fighter it was a continuous attack that involves an uppercut that crushes the opponent's jaw followed up with a knee kick.
![xmen vs street fighter shoryuken wiki xmen vs street fighter shoryuken wiki](https://static.wikia.nocookie.net/streetfighter/images/a/a6/SF1-Shoryuken_1HKO.png)
Shoryuken was created by Takashi Nishiyama and it was Hiroshi Matsumoto's idea to make the move invincible. In the original Street Fighter, Shoryuken was a 1 hit KO move.