Turns out the Flareon used in the anime and cards is actually based off the original official artwork.
There are bigger pics on the net, but this is the best quality image I've seen. It's on an unreleased TCG card, however, but it uses the artwork from the original Pokemon games.
Kind of makes you wonder why they took away it's yellow coat in the games.
Once in a year on February 27 everyone at Gamefreak meets up to decide how they can make Flareon even more miserable. This was one of these decisions.