Shounen Ashibe: Go! Go! Goma-chan

Shows based on Vocaloid originals or involving utaites/producers who are/have been active on Nico Nico Douga (extended to YouTube for newer gens).
While not its own genre, these compositions tend to have a recognisable feel to them.
(Updating as I come across songs, you can poke me to add stuff as well :D)

2nd stack for post-2020 anime debuts: https://myanimelist.net/stacks/26372

Actual Vocaloids:
GUMI ~ Joshikousei no Mudazukai / Agukaru: Play with Ibaraki-hen (cv: Megumi Nakajima)
IA ~ Recorder to Randoseru Mi☆ (cv: Lia)
Miku ~ Akikan / Watamote / Yami Shibai / Black Rock Shooter / Kemurikusa / ALFA-X / Aware! Meisaku / Petit Seka (cv: Saki Fujita)
MEIKA Hime & Mikoto ~ Hakata Mentai! Pirikarako-chan (cv: Kotori Koiwai)
Luka ~ Copihan (cv: Yuu Asakawa)
Meaw (possibly) ~ Honto ni Atta! Reibai Sensei
Go! Go! 575
Zunda Horizon

Luo Tianyi ~ Wan Sheng Jie

Prioritising first appearances/multiple artists bc of 50 limit. For composer entries, the singer is only listed if they're
At some point, I'd have been super hyped for any show with a Vocaloid producer but come late 2010s they've been popping up everywhere :')

*List is roughly sorted by anime based on Vocaloid songs > Male utaites > Female utaites > Producers

List of anime with pretty colors, cute characters or pets/mascots.

Anime about seals.

Demographic: Kids, Josei, Seinen

Tags: Animal, Anthropomorphic, Azarashi, Cute, Kawaii, Kodomo, Seal

These are the anime that appear in Super Robot Wars X-Ω, a mobile phone game that is now defunct.
It's being split into multiple parts because there are so many.
I promise you that nothing on this stack is a joke.

Anime with short episode length part 2.

Shounen Ashibe Watch Order:
(6 TV Series, 2 OVAs)
1. Shounen Ashibe (Jan 21, 1991) | OVA | 6 episodes x 50 min. per ep. - Other
2. Shounen Ashibe (Apr 11, 1991 to Dec 28, 1991) | TV | 37 episodes × 25 min. per ep. - Prequel / Alternative Version
3. Shounen Ashibe Anzen Kyouiku Anime (1992–1993) | OVA | 2 episodes × 14 min. per ep. - Other
4. Shounen Ashibe 2 (Oct 3, 1992 – Mar 27, 1993) | TV | 25 episodes × 25 min. per ep. - Sequel / Alternative Version
5. Shounen Ashibe: Go! Go! Goma-chan (Apr 5, 2016 – Feb 21, 2017) | TV | 32 episodes × 9min. - Alternative Version / Prequel
6. Shounen Ashibe: Go! Go! Goma-chan 2 (Apr 5, 2016 to Feb 21, 2017) | TV | 32 episodes × 9 min. per ep. - Alternative Version / Sequel / Prequel
7. Shounen Ashibe: Go! Go! Goma-chan 3 (Apr 3, 2018 to Feb 26, 2019) | TV | 32 episodes × 9 min. per ep. - Alternative Version / Sequel / Prequel
8. Shounen Ashibe: Go! Go! Goma-chan 4 (Apr 2, 2019 to Dec 17, 2019) | TV | 24 episodes × 9 min. per ep. - Sequel

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Genres: Comedy, Slice of Life
Theme: Educational
Demographic: Kids, Seinen

Tags: Animal, Anthropomorphic, Azarashi, Cute, Kawaii, Kodomo, Seal, Franchise

For more anime about seals, check this stack: Seal
https://myanimelist.net/stacks/11538

✔️。

Collection of series featuring a male main character and a companion creature.

Boy and Creature: https://myanimelist.net/stacks/37389
Girl and Creature: https://myanimelist.net/stacks/28373

For anime which have 20+ episodes and only one opening and one ending

source: https://akurasu.net/wiki/Super_Robot_Wars/Master_Series_list
Part 1: https://myanimelist.net/stacks/60399/
Part 2: https://myanimelist.net/stacks/60670/
Part 3: https://myanimelist.net/stacks/60675/
Part 4: https://myanimelist.net/stacks/60681/
Manga and LNs: https://myanimelist.net/stacks/60403/