Zanpakutō Unknown Tales arc

The Zanpakutō Unknown Tales arc is the term used to refer to all the events that took place during the anime-exclusive Zanpakutō Spirit arc.

Trivia

 * During the Zanpakutō arc, Renji has a flashback of his fight against Szayel Aporro Granz when he fights Zabimaru. This might cause a conflict with the manga, as the future of the main characters is unknown (however they may change this in the anime)