More items from @Skitariiposting .
2023 Pokémon Últimas Evoluciones Colección I (Crealaser/Editorial Monarca) - Holo
Unofficial merchandise.
I’ve identified cards from this set previously here, though not the holo: The Giant Pokémon non-TCG Identification Thread - #250 by sableguy
The layout of the cards matches your Feebas.
There is also a non-holo Feebas in this set:
2018 Pokémon Ultra Vol. 4 (3Reyes) - Non-holo
Unofficial merchandise.
A poster advertising it can be seen here. The layout of the cards matches your Feebas.
Here is a picture of the collection binder:
While the exact set is not shown, a fan checklist (“fanmade by Orlando Minano of Facebook”) from the website below states Feebas is in Vol. 4.
Source: https://3reyespokemon.blogspot.com/2017/10/