Question: Who allied with the Pecheneg prince who appears as a villain in a 2006 Russian traditionally-animated feature film loosely based on the story of prince Vladimir the Fair Sun?
Sentence (from "Prince Vladimir (film)"): It is loosely based on the story of prince Vladimir the Fair Sun, who converted Kievan Rus' (a predecessor state of Russia, Ukraine, and Belarus) to Christianity in the late 10th century.
Relevant evidence: Yes