The Bashkir Horse is a horse breed available in Star Stable: The Summer Rider.
"The Bashkir Curly comes from the Ural Mountains in Asia. It is a tough breed, hardened by the conditions of its native area, but it is still very easy to work with. Bashkir Curlies are extremely hardy and are great for covering long distances even in the worst possible weather. They are also very resilient to cold." - Star Stable: The Spring Rider
The Game incorrectly identifies this horse as the Bashkir Curly (American Curly Horse) when in fact the game's model and description identify the horse as the Bashkir Horse, which is a different breed altogether from the Bashkir Curly.
The confusion may have stemmed from the fact that some Bashkir Horses can grow a Curly coat, a trait it has in common with the Bashkir Curly who is defined by it's coat.
A Bashkir Horse is available in Star Stable: The Summer Rider, at Cod Point Stables. It comes in one color, Chestnut.