My aunt found this article in a magazine in Mexico.
It talks about how to close the 25th Anniversary of MLP, Hasbro organized a big event in Mexico where some Mexican fashion designers had to design outfits for some ponies. Apparently there was a big party to show off the designs.
(SR Edit: Added info from BabyExplorer

)
A few key points about the Mexican version:
- Styling Starcatcher was used as the base
- There were designers who participated (and thus 10 ponies made)
- They were displayed for three weeks at the "Palacio de hierro"
- At the end of the three weeks, they were auctioned off at a live event.
- The money went to Fondo Unido
- Over 5500 Pesos were raised for the charity from the event
Here's a few links to check out if you're interested in more info. They're in Spanish, so if you don't read Spanish, maybe try running them through Babelfish or something:
Revista Fernanda - Estilo de vida - Mi pequeño pony cumple su cuarto de siglo
Se subastaron los Ponys, conoce los detalles de la velada | Masaryk
