Tsubasa RESERVoir CHRoNiCLE - Season 1 - Eps 25: The Ultimate Game
The fight between the group and the Oni continues, while Seishirō is told the real truth behind everlasting life in the game. Syaoran climbs to the top of the rollercoaster and tells Seishirō that he doesn't think he will be able to beat him in his current state. However, he has decided to get the feather back; so he draws his sword even though he knows he's not quite ready yet. When he draws the sword, it bursts into flames and the fight begins. Seishirō takes off soon after the fight begins, but as he leaves, the Oni are left behind for them to take care of. After finishing them off, Mokona reacts to the power of the item Seishirō used and takes the group to the next world.
About Tsubasa RESERVoir CHRoNiCLE

Title: Tsubasa RESERVoir CHRoNiCLE
First Air Date: 2005-04-09
Last Air Date: 2006-11-04
Status: Ended
Rating: 6.7/10 (from 34 votes)
Language: JA
Seasons: 3
Total Episodes: 52
Network: NHK Educational TV
Genres: Animation, Drama, Sci-Fi & Fantasy
Production Companies: NHK, BeeTrain
Synopsis
Syaoran fights to gather the scattered soul of his beloved princess Sakura, whose memories were sent adrift across space and time.
Cast

Mika Kikuchi
Mokona Modoki (voice)

Yui Makino
Sakura (voice)

Miyu Irino
Syaoran (voice)

Daisuke Namikawa
Fay (voice)

Tetsu Inada
Kurogane (voice)

Maaya Sakamoto
Tomoyo Daidouji (voice)

Sanae Kobayashi
Xing Huo (voice)

Akiko Hiramatsu
Arashi (voice)

Akio Suyama
Sorata (voice)

Sayaka Ohara
Yuuko (voice)