Os Final Smash do Ryu são feitos a partir da distância e não por algum comando ou algo do tipo.
Se você estiver à poucos passos do oponente, o Ryu fará o Shin Shoryuken.
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It's very simple: The Final Smash of the Ryu are made from the distance and not by any command or something.
If you're just a few steps from the opponent, Ryu will do the Shin Shoryuken.
If you are further than the opponent, Ryu will do the Shinku Hadouken