Bleach: Season 1, Episode 33

1 - 33: Miracle! The Mysterious New Hero

Ichigo's two sisters find a cat and decide to adopt him and call him Raku. Both of them meet the celebrity Kan'onji who is searching for a sidekick (Karakura red). On their way they meet Urahara's two assistants who want to be Kan'onji's sidekicks as well. They then discover that Raku died a long time ago in an accident related to Ichigo's younger sister, Yuzu, and that now Raku is hunted by hollows. After fighting the hollows and almost losing to them, Raku shows his true form - a great lion, or as called by Kan'onji - "Karakura Lion Jet". After defeating the hollows, Raku disappears and accepts his death.