Tsubasa: Shunraiki

A comprehensive watch order of the xxxHOLiC series, which includes every entry of the xxxHOLiC franchise.
Original Guide: https://myanimelist.net/forum/?topicid=1872963

AEGC Interest Stack index: https://myanimelist.net/forum/?topicid=2017008

Welcome to the MCU.
Based on original manga timeline series not anime realease order. Not include character designs. The phases were created by me.
Unfortunately not all the mangas were adapted so I highly recommend read the manga for more comprehension (Specially the TRC chronology).

Phase I: Tower of Tokyo saga

-RgVeda
-X
-Tokyo Babylon
-Clamp Gakuen Tanteidan

Phase II: Magic saga

-Miyuki Chan in wonderland
-Magic knight Rayearth
-Wish
-Card Captor Sakura
-Kobato

Phase III: Robots saga

-Clover
-Angelic layer
-Chobits

Phase IV: Crossover saga

-Xxxholic
-Tsubasa Reservoir Chronicles
-Clamp in wonderland
-Clamp in wonderland 2
-Aruhi no Clamp Gakuen Tanteidan

Tsubasa: RESERVoir CHRoNiCLE (TRC) Watch Order:
* 1. Tsubasa Chronicle (Apr 9, 2005 to Oct 15, 2005) | TV | 26 episodes × 25 min. per ep. - Parent Story / Prequel
★ xxxHOLiC Movie: Manatsu no Yoru no Yume (Aug 20, 2005) | Movie | 1 episode × 1 hr. - Character
2. Tsubasa Chronicle: Tori Kago no Kuni no Himegimi (Aug 20, 2005) | Movie | 1 episode × 35 min. - Side Story
* 3. Tsubasa Chronicle 2nd Season (Apr 29, 2006 to Nov 4, 2006) | TV | 26 episodes × 25 min. per ep. - Sequel / Alternative Version
★ CLAMP in Wonderland 2 (Oct 26, 2007) | Music | 1 episode x 5 min. - Character
4. Tsubasa: Tokyo Revelations (Nov 16, 2007 to Mar 17, 2008) | OVA | 3 episodes × 30 min. per ep. - Alternative Version / Prequel
5. xxxHOLiC: Shunmuki (Feb 17, 2009 to Jun 23, 2009) | OVA | 2 episodes × 26 min. per ep. - Side Story
6. Tsubasa: Shunraiki (Mar 17, 2009 to May 15, 2009) | OVA | 2 episodes × 29 min. per ep. - Sequel

Note: Those with asterisks (*) are the main stories. Other CLAMP titles with character appearances in TRC are enclosed in square brackets []. Wikipedia, Fandom, AniDB and ANN links are also included for more info.

You may also want to watch the other CLAMP franchises especially the xxxHOLiC franchise and the Cardcaptor Sakura franchise to better understand the Tsubasa Chronicle universe or the CLAMP universe.

Other Guides:
CLAMP: Anime Watch Guides - https://myanimelist.net/stacks/35114
• xxxHOLiC Watch Order Guide: https://myanimelist.net/stacks/10637
• Cardcaptor Sakura Watch Order Guide: https://myanimelist.net/stacks/11028
• Tokyo Babylon and X Watch Order Guide https://myanimelist.net/stacks/20552

P.S. I have yet to rewatch this franchise with subtitles. The dubbed version is pretty good.

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Mangaka/Original Creator: CLAMP
Genres: Action, Adventure, Drama, Fantasy, Mystery, Romance, Supernatural
Demographic: Shounen

Tags: Feather, Memories, Princess, Samurai, Wizard, Franchise

Club: ~:: Tsubasa RESERVoir CHRoNiCLE ::~ https://myanimelist.net/clubs.php?cid=482 (Inactive)

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AniDB: https://anidb.net/perl-bin/animedb.pl?show=anime&aid=2733
ANN: https://www.animenewsnetwork.com/encyclopedia/anime.php?id=4591

Wikis:
Wikipedia: https://en.wikipedia.org/wiki/Tsubasa:_Reservoir_Chronicle
CLAMP Wiki: https://clamp.fandom.com/wiki/CLAMP_Wiki
Tsubasa: RESERVoir CHRoNiCLE Wiki: https://tsubasa.fandom.com/wiki/Tsubasa:_RESERVoir_CHRoNiCLE_Wiki
‣List of TRC Manga Chapters: https://en.wikipedia.org/wiki/List_of_Tsubasa:_Reservoir_Chronicle_chapters | https://tsubasa.fandom.com/wiki/List_of_Tsubasa:_RESERVoir_CHRoNiCLE_chapters
‣List of TRC Anime Episodes: https://en.wikipedia.org/wiki/List_of_Tsubasa:_Reservoir_Chronicle_episodes | https://tsubasa.fandom.com/wiki/List_of_Tsubasa:_RESERVoir_CHRoNiCLE_episodes
❂Fillers (18): https://tsubasa.fandom.com/wiki/Category:Fillers
S1: Ep, 16, 26
S2: Ep. 30, 31, 32, 37, 38, 39, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52

Note: Use JustWatch to check availability in your region.
https://www.justwatch.com/us/tv-show/tsubasa-chronicle

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xxxHOLiC Watch Order:
1. xxxHOLiC Movie: Manatsu no Yoru no Yume (Aug 20, 2005) | Movie | 1 episode × 1 hr. - Side Story
★ Tsubasa Chronicle (Apr 9, 2005 to Oct 15, 2005) | TV | 26 episodes × 25 min. per ep. - Character
★ Tsubasa Chronicle: Tori Kago no Kuni no Himegimi (Aug 20, 2005) | Movie | 1 episode × 35 min. - Character
* 2. xxxHOLiC (Apr 7, 2006 to Sep 29, 2006) | TV | 24 episodes × 24 min. per ep. - Parent Story / Prequel
★ Tsubasa Chronicle 2nd Season (Apr 29, 2006 to Nov 4, 2006) | TV | 26 episodes × 25 min. per ep. - Sequel / Alternative Version
★ CLAMP in Wonderland 2 (Oct 26, 2007) | Music | 1 episode x 5 min. - Character
★ Tsubasa: Tokyo Revelations (Nov 16, 2007 to Mar 17, 2008) | OVA | 3 episodes × 30 min. per ep. - Alternative Version / Prequel
* 3. xxxHOLiC: Kei (Apr 4, 2008 to Jun 27, 2008) | TV | 13 episodes × 24 min. per ep. - Sequel / Prequel
4. xxxHOLiC: Shunmuki (Feb 17, 2009 to Jun 23, 2009) | OVA | 2 episodes × 26 min. per ep. - Sequel / Prequel
★ Tsubasa: Shunraiki (Mar 17, 2009 to May 15, 2009) | OVA | 2 episodes × 29 min. per ep. - Sequel
5. xxxHOLiC: Rou (Apr 23, 2010 to Mar 9, 2011) | OVA | 2 episodes × 35 min. per ep. - Sequel

OR

1. xxxHOLiC Movie: Manatsu no Yoru no Yume (Aug 20, 2005) | Movie | 1 episode × 1 hr. - Side Story
* 2. xxxHOLiC (Apr 7, 2006 to Sep 29, 2006) | TV | 24 episodes × 24 min. per ep. - Parent Story / Prequel
* 3. xxxHOLiC: Kei (Apr 4, 2008 to Jun 27, 2008) | TV | 13 episodes × 24 min. per ep. - Sequel / Prequel
4. xxxHOLiC: Shunmuki (Feb 17, 2009 to Jun 23, 2009) | OVA | 2 episodes × 26 min. per ep. - Sequel / Prequel
5. xxxHOLiC: Rou (Apr 23, 2010 to Mar 9, 2011) | OVA | 2 episodes × 35 min. per ep. - Sequel

Note: Those with asterisks (*) are the main stories. Other CLAMP titles with character appearances in xxxHOLiC are enclosed in square brackets []. Wikipedia, Fandom, AniDB and ANN links are also included for more info.

You may also want to watch the Tsubasa Chronicle franchise as it is related to this franchise and to better understand the CLAMP universe.

Other Guides:
CLAMP: Anime Watch Guides - https://myanimelist.net/stacks/35114
• Tsubasa Chronicle Watch Order Guide: https://myanimelist.net/stacks/10622

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Live-action Adaptations:
1. xxxHolic (CLAMP Drama xxxHOLiC) (February 24 to April 16, 2013) | TV | 8 episodes x 30 mins.
2. xxxHolic (2021) | Stage Play
3. xxxHolic (April 29, 2022) | Movie | 1 episode x 110 mins.

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Mangaka/Original Creator: CLAMP
Genres: Comedy, Drama, Mystery, Supernatural
Theme: Psychological
Demographic: Seinen

Tags: Spirit, Wish, Franchise

Club: XXxHolic fanclub~ https://myanimelist.net/clubs.php?cid=1325 (Inactive)

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AniDB: https://anidb.net/perl-bin/animedb.pl?show=anime&aid=4032
ANN: https://www.animenewsnetwork.com/encyclopedia/anime.php?id=6052

Wikis:
Wikipedia: https://en.wikipedia.org/wiki/XxxHolic
CLAMP Wiki: https://clamp.fandom.com/wiki/CLAMP_Wiki
xxxHolic Wiki: https://xxxholic.fandom.com/wiki/XxxHOLiC_Wiki
‣List of xxxHOLiC Manga Chapters: https://en.wikipedia.org/wiki/List_of_xxxHolic_chapters
https://xxxholic.fandom.com/wiki/List_of_xxxHOLiC_chapters#Manga_Volume_List#Manga_Volume_List
https://xxxholic.fandom.com/wiki/List_of_xxxHOLiC_chapters#Rei_Volume_List#Rei_Volume_List
‣List of xxxHOLiC Anime Episodes: https://en.wikipedia.org/wiki/List_of_xxxHolic_episodes | https://xxxholic.fandom.com/wiki/List_of_xxxHOLiC_episodes

Note: Use JustWatch to check availability in your region.
https://www.justwatch.com/us/tv-show/xxx-horitsuku
https://www.justwatch.com/us/search?q=xxxHOLiC

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Standalone OVAs from 2000-2009.
Eve no Jikan is labeled on MAL as an ONA, but won the OVA Category during the 2010 Tokyo Anime Award.
There are potentially other OVAs that are labeled as ONAs that aren't included in this list.

Others notable Non OVAs included:
Halo Legends is an ONA.
Mizu no Kotoba is a special.
Interstella5555: The 5tory of The 5ecret 5tar 5ystem is a music video.

Don't watch CLAMP animes, they always differs from the original manga. But if you're gonna ignore me then here you go the list of the main titles.

Anime where Yuki Kajiura is credited with Music.