Evil Ryu, (殺意の波動に目覚めたリュウ, Satsui no Hadō ni Mezameta Ryū, "Ryu who has Awakened to the Surge of Killing Intent", Satsui Ryu in short), or Dark Ryu in the UDON comics, is an evil version of Ryu appearing in the various Street Fighter games beginning with Street Fighter Alpha 2