Shoryuken

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Shoryuken is 's up special move in Super Smash Flash 2.

Overview
When used, Ryu performs a powerful leaping uppercut while announcing "SHORYUKEN!". The move has almost no startup, making it incredibly difficult to predict, but has severe ending lag if it misses, making it a high risk, high reward move.

Origin
The Shoryuken (known colloquially as the "Dragon Punch") is one of the special moves used by Ryu, Ken, and various other characters in the  series. It is a rising uppercut, involving the user jumping off the floor with a fist raised and a full body spin. Ryu's Shoryuken hits only once, and knocks the opponent down. Though it possesses invincibility across its many incarnations, it is very unsafe on whiff and block at higher strengths, leaving the user vulnerable during its recovery.

This is one of the more codifying moves in fighting games, as a high number of characters, even in other series, possess similar attacks (an upward rising attack with starting invincibility), with these moves often being dubbed as "Dragon Punch"-type moves; the  series itself is no exception, considering its many recovery-type up special moves. However, it also codifies the archetype of special moves that are meant to be used as anti-airs; other characters in games with this kind of move may be able to perform their versions in midair, something Ryu and Ken cannot do in most Street Fighter titles.