This lovely piece is by probablyfakeblonde . Unfortunately, it seems that she no longer has an account with FA and I don't recall seeing where else to find her, but still, I want to give her credit for this piece.
I had a 'what-if' idea of what a Rapidash would look like, specifically a shiny Rapidash, if it had kept the same color scheme as a shiny Ponyta.
I really love Blonde's style, since it also seemed to tie in aspects of one of my favorite movies growing up 'The Last Unicorn'. She brought that style here and it turned out to be quite an amazing meld.
That being said, I'd like you to meet my Shiny Rapidash, Firenia.