Ikkaku Madarame's Bankai might be the most controversial one in Bleach, especially with how Tite Kubo has mistreated his arc and deliberately made him weaker.

Accumulated spiritual power lets fighters use Spiritual Pressure Moves, then awaken and unleash Bankai. The game's story ... anime franchise including Ichigo Kurosaki, Rukia Kuchiki, Uryu Ishida ...