Bleach Episode 188: Duel! Amagai vs. Ichigo
Episode 188 of 366 of Bleach, aired September 17, 2008, 24 minutes. Available with English subtitles and dub where released.
Episode summary
Ichigo and Amagai finally face off. With Amagai's bakkutou sealing his shinigami reiatsu, Ichigo is forced to use his Vaizard's mask and hollow powers.