Hetalia: The World Twinkle

Anime where the average episode runtime is under 20 minutes

Part 2: https://myanimelist.net/stacks/62002

Anime with lots of cute boys mostly excluding the sports, yaoi, romance or harem genre. Just cute boys doing stuff.
There is a number 2 now https://myanimelist.net/stacks/37404

animes with episodes under 20 minutes

You can actually watch Hetalia in any order. But here's a guide if you want to watch it by release order. Those with asterisks (*) are the parent stories.

Basically, Axis Powers > World Series > The Beautiful World > The World Twinkle > World★Stars.

Hetalia Watch Order:
(5 ONAs, 3 OVAs, 1 Movie, 4 Specials)
* 1. Hetalia Axis Powers (Jan 24, 2009 to Mar 5, 2010) | ONA | 52 episodes × 5 min. per ep. - Prequel / Parent Story
* 2. Hetalia World Series (Mar 26, 2010 to Mar 11, 2011) | ONA | 48 episodes × 5 min. per ep. - Sequel / Prequel / Parent Story
3. Hetalia Axis Powers Fan Disc (May 25, 2010) | OVA | 1 episodes × 5 min. - Side Story
4. Hetalia Axis Powers Movie: Paint it, White (Jun 5, 2010) | Movie | 1 episode × 1 hr. 20 min. - Side Story
5. Hetalia World Series Specials (Mar 25, 2011 to Sep 24, 2012) | Special | 4 episodes × 5 min. per ep. - Side Story
* 6. Hetalia: The Beautiful World (Jan 25, 2013 to Jun 21, 2013) | ONA | 20 episodes × 5 min. per ep. - Sequel / Parent Story / Prequel
7. Hetalia: The Beautiful World Specials (Apr 24, 2013 to Oct 30, 2013) | Special | 4 episodes × 5 min. per ep. - Side Story
8. Hetalia: The Beautiful World Extra Disc (Feb 26, 2014) | OVA | 1 episode × 5 min. - Side Story
* 9. Hetalia: The World Twinkle (Jul 3, 2015 to Oct 9, 2015) | ONA | 15 episodes × 5 min. per ep. - Sequel / Other / Parent Story
10. Hetalia: The World Twinkle Specials (Oct 28, 2015 to Dec 25, 2015) | Special | 3 episodes × 5 min. per ep. - Other
11. Hetalia: The World Twinkle Extra Disc (Feb 24, 2016) | OVA | 1 episodes × 12 min. - Side Story
* 12. Hetalia World★Stars (Apr 1, 2021 to Jun 17, 2021) | ONA | 12 episodes × 5 min. per ep. - Side Story / Sequel / Prequel
13. Hetalia World★Stars Specials (Jul 28, 2021) | Special | 3 episodes × 5 min. per ep. - Sequel

If you wan't to watch in chronological order, start with (1) Hetalia Axis Powers followed by (3) Hetalia Axis Powers Fan Disc and (4) Hetalia Axis Powers Movie: Paint it, White before (2) Hetalia World Series and then (5) to (13) as listed.

I watched these out of order with subtitles. I will rewatch these in release order with dub.

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Reading Order:
1. Hetalia Axis Powers (Mar 28, 2008 to Jun 29, 2013) - Parent Story
2. Hetalia World☆Stars (Sep 22, 2014 to ?) - Side Story

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Mangaka: Himaruya, Hidekaz https://myanimelist.net/people/6659/Hidekaz_Himaruya
Genre: Comedy
Themes: Anthropomorphic, Gag Humor, Historical, Parody

Tags: Country, Nation, World War, Franchise, Short Series

Club: Axis Powers Hetalia Club https://myanimelist.net/clubs.php?cid=6455 (Inactive)

AWCc:
Hetalia Collection: https://myanimelist.net/forum/?topicid=1538132#msg47884000
HoF: https://anime.jhiday.net/hof/challenge/hetalia

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Official Sites:
Series:
• Hetalia Axis Powers http://hetalia.com/top.htm
• Hetalia World Series http://hetalia.com/story/world_series.htm
• Hetalia Axis Powers Movie: Paint it, White http://hetalia.com/movie/index.htm
• Hetalia: The Beautiful World http://hetalia.com/bw/
• Hetalia: The World Twinkle http://hetalia.com/twt/
• Hetalia World★Stars https://hetalia-ws.com

Hetalia Musical http://musical-hetalia.com
https://www.gentosha-comics.net/search/?search_word=ヘタリア&search_menu=keyword:
https://shonenjumpplus.com/episode/10833497643049549836

Twitter (X):
日丸屋秀和 公式 (Hidekazu Himaruya Official) (@hima_kaz) https://x.com/hima_kaz
Hetalia Official (@animehetalia) https://twitter.com/animehetalia
Hetalia Official (@HetaliaOfficial) https://x.com/HetaliaOfficial
アニメ「ヘタリア World★Stars」公式 (Official website of the anime "Hetalia World★Stars") (@animehetalia_ws) https://x.com/animehetalia_ws
ミュージカル「ヘタリア〜The glorious world～」公式 (@hetamu_official) https://twitter.com/hetamu_official

Wikis:
https://en.wikipedia.org/wiki/Hetalia:_Axis_Powers
Characters: http://hetalia.com/character/index.htm
‣List of Hetalia: Axis Powers Characters: https://en.wikipedia.org/wiki/List_of_Hetalia:_Axis_Powers_characters
‣List of Hetalia: Axis Powers Episodes: https://en.wikipedia.org/wiki/List_of_Hetalia:_Axis_Powers_episodes | https://hetalia.kitawiki.net/index.php/List_of_Hetalia_episodes
Season 1 (Axis Powers Season 1): Ep. 1-26
Season 2 (Axis Powers Season 2): Ep. 27-52
Season 3 (World Series Season 1): Ep. 53-76
Season 4 (World Series Season 2): Ep. 77-100 + 53.5
Season 5 (Beautiful World series): Ep. 101-120
Season 6 (The World Twinkle series): Ep. 121-135
Season 7 (World Stars Series): Ep. 136-147
Extra episodes:
World Series Ep. 1-5
Beautiful World Ep. 6-10
World Twinkle Ep. 11-14
World Stars Ep. 15-17

Hetalia Wiki: https://hetalia.fandom.com/wiki/Hetalia_Archives
Hetalia Archives: https://hetalia.kitawiki.net
ANN: https://www.animenewsnetwork.com/encyclopedia/manga.php?id=10178
Hetarchive (A Hetalia Reference Guide) https://hetarchive.net/

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There's Hetalia Archives but I need a Hetalia episode to chapter (+ musicals, drama CDs, etc.) converter badly. Ugh, I don't think I could do it; there are so much media material.

Anime: https://hetalia.kitawiki.net/index.php?title=Category:Anime | https://hetalia.kitawiki.net/index.php?title=List_of_Hetalia_episodes
Manga: https://hetalia.kitawiki.net/index.php?title=Category:Manga
Audio: https://hetalia.fandom.com/wiki/Category:Media
https://hetalia.kitawiki.net/index.php?title=Category:Audio_Media | https://hetalia.kitawiki.net/index.php?title=List_of_Hetalia:_Axis_Powers_CDs
http://hibikiforum.net/index.php?title=Category:Hetalia_Series
Musicals: https://hetalia.kitawiki.net/index.php?title=Category:Musicals | https://hetalia.kitawiki.net/index.php?title=HetaMyu

Note: I added episode lists and some synopsis/summary for Hetalia Axis Powers and Hetalia World Series (as well as some of the extras) because the Hetalia Axis Powers Fan Disc was confusing. Those with ⬅️ are part of the fan disc.

✔️。

Educational Anime
- (contains Anime that aren't educational for everyone or shows that are educational in a wider sense).
- excluding adaptations of western literature like Heidi, Three Musketeers etc.

Shows you can watch within an hour or a couple of hours.

[Unfinished]

Complete Hetalia Franchise Watch Order.

Dzień dobry, it's Poland related anime - whether there's some polish characters or just Chopin or anything somehow related to Poland. I didn't watch all of this, if I am wrong, please contact me! I will be updating the list.
Thanks to LittleStar for help!

Part 1: https://myanimelist.net/stacks/5521
Part 2: https://myanimelist.net/stacks/35988
Part 3: https://myanimelist.net/stacks/63221
Part 4: https://myanimelist.net/stacks/70752