Focus Attack

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Focus Attack is 's down special move in Super Smash Flash 2.

Overview
When used, Ryu sinks into a defensive stance and surrounds himself in a black aura as he concentrates. After a period, he will strike with a paralyzing, ink-trailed punch. During the charging period, Ryu can take up to one hit before he throws the punch, regardless of damage, and the paralysis lengthens depending on Focus Attack's charge, with a fully-charged Focus Attack being unblockable, and making any fighter hit slowly crumple to the the ground, allowing Ryu to initiate combos or finish the defenseless opponent off.

Origin
Focus Attack is a move that was first introduced in Street Fighter IV, where every fighter has access to a unique Focus Attack. The move can absorb one hit while charging but has laggy startup otherwise. It is performed by pressing both the medium punch and kick buttons at the same time, and the move has three charge stages:

This move can be disrupted by grabs, multi-hitting moves, and any attack classified as an armor breaker, such as Tatsumaki Senpukyaku. However, each character has access to a Focus Attack Dash Cancel, that allows them to cancel Focus Attack via a dash, allowing them to escape an opponent's attempt to hit them out of Focus Attack, and punish them.
 * Level 1: The fastest Focus Attack in terms of startup, but deals little damage, hitstun, and blockstun
 * Level 2: This level of Focus Attack is able to crumple the opponent for two seconds, as well as dealing increased damage, blockstun, and hitstun
 * Level 3: The fully-charged Focus Attack. When it hits an opponent, it is unblockable, and possesses the super armor property until the hitbox activates, and crumples the opponent for slightly longer.