Ichigo Becomes a Hollow!
Ichigo trains with Urahara. He is underground trapped in the hole with 72 hours left until his life chain will come to its end. Held by a binding spell, he waits while Jinta and Ururu tease him. When his chain is no more, he goes though the process of becoming a Hollow. In his mind Ichigo finds that he has to find the shinigami box or he will become a Hollow. After he finds the box he comes out of the hole a semi-hollow, semi-shinigami. He breaks the mask and Urahara moves on to the third lesson: defeat Urahara.
Aired 15/02/2005EP 19 - Ichigo Becomes a Hollow!

Bleach
Ichigo Kurosaki is a rather normal high school student apart from the fact he has the ability to see ghosts. This ability never impacted his life in a major way until the day he encounters the Shinigami Kuchiki Rukia, who saves him and his family's lives from a Hollow, a corrupt spirit that devours human souls.
Wounded during the fight against the Hollow, Rukia chooses the only option available to defeat the monster and passes her Shinigami powers to Ichigo. Now forced to act as a substitute until Rukia recovers, Ichigo hunts down the Hollows that plague his town.