:Konyok Gorbunok, that is The Little Horse - Little Humpback), is a 1947 Soviet/Russian traditionally animated feature film directed by I. Ivanov-Vano and produced by the Soyuzmultfilm studio in Moscow.
The film is based on the literary fairy tale poem with the same title by Pyotr Pavlovich Yershov, and because of this, it is spoken in rhyme.
This version, translated in English by George Molko, was released on October 25, 1977, as The Magic Pony.
The elder brothers decide to lie hidden in a haystack, where they promptly fall asleep.
Ivan leads the two black horses to a stable and runs off with Konyok-gorbunok to fetch them buckets of water.
Along the way, Ivan finds the fiery feather of a firebird, which shines without giving off any heat, and takes it despite Konyok-gorbunok's warning that it will cause him difficulty later.
Konyok-gorbunok comes to Ivan and through the prison bars tells him not to worry - to simply whistle for him in the morning and let him put a magic spell on the water so that it will not be harmful to him.
Spalnik presumably falls to his death when the rope holding the bucket breaks, and Konyok-gorbunok comes to Ivan's rescue at the last moment, putting a spell on the three cauldrons of water.
In 2004, with the technical expertise now existing in Russia, the original film was restored and released on DVD by Krupnyy Plan (Крупный План).
The 1975 version was redubbed, recut and released in the United States as The Magic Pony on October 25, 1977, with Erin Moran voicing the Magic Pony, Jim Backus as the voice of the Tsar, Hans Conried as Spalnik and Johnny Whitaker as Ivan.
The 1975 edition was released on home video by film association Krupny Plan in the early 1990s.
Both were later released on VHS by Soyuzmultfilm, and also by Studio PRO Video in their collection "The Best Soviet Animated Films”.