Kidou Shinsengumi Moeyo Ken

ADV Films, the former incarnation of Sentai Filmworks, produced most of their English dubs in Houston, Texas. However, from the late 1990s until 2005, ADV also employed a secondary studio in Austin, Texas, known as Monster Island.

Monster Island could be considered ADV's "2nd-string" studio, as many (though not all) shows they dubbed were lesser-known and perhaps lesser quality. Shipping them to MI may have been a cost-cutting move, as many of the dubs are marred by fast-and-loose scriptwriting, questionable name pronunciations, and a general sense of roughness and inexperience.
Still, a lot of them had their own sort of charm, and some are well-regarded. You can find some comments about the dubs from me on some individual entries. Some may be approaching "lost media" status, or are not commonly available online by legal or illegal means.

So if you've encountered an ADV dub from the early 2000s and wondered why the cast was full of names you hadn't heard of, or why it felt different from the average ADV dub, chances are it was a Monster Island show.

*Note: some related/sequel titles dubbed by MI are noted only in the comments, in order to stay under the 50-item limit.

List with all the Latin Spanish dubbing available on the Anime Onegai platform, whether they are distributed by Onegai or available on the platform.

- Part 01: https://myanimelist.net/stacks/45961
- Part 02: https://myanimelist.net/stacks/45963
- Part 03: https://myanimelist.net/stacks/45965

Anime Onegai it's an exclusive platform in Latin America for anime that has been around since 2020, and since then they have dubbed a lot of series for the platform.
The order will be according to the release of each dub, if you want to see the animes that came subtitled, redubbed or dubbed by other companies to the platform, you can see it here: https://myanimelist.net/stacks/38863

Also, here are the links to the other parts:
https://myanimelist.net/stacks/34557
https://myanimelist.net/stacks/34560
https://myanimelist.net/stacks/34599
https://myanimelist.net/stacks/44113

So yeah, that would be all. Enjoy!