Bartok the Magnificent, directed by Don Bluth and Gary Goldman, is a 1999 direct-to-video spin-off to the 1997 film Anastasia, which features Hank Azaria as the voice of Bartok, Kelsey Grammer as the voice of Zozi, and Jennifer Tilly as Piloff. It is a "family adventure...animated comedy" film, according to Fort Oglethorpe Press.
Although the film was released after Anastasia, it is unclear if the events in the film take place before or after those of its predecessor. While many of Don Bluth's films have received sequels and spin-offs, this is the only spin-off Don Bluth has directed. Variety writer John Laydon explained how the films were connected: "The literally batty sidekick who swiped scenes throughout 1997's 'Anastasia' is rewarded with his very own animated adventure in 'Bartok the Magnificent', a lightly diverting direct-to-video opus". He also argued that the film was a prequel "since the setting is pre-revolutionary Russia"
Russia is being terrorized by an evil witch known as Baba Yaga (Andrea Martin), and the only one who is not afraid of her is Bartok the Magnificent (Hank Azaria). Bartok, an albino bat, has just arrived in Moscow and is impressing everyone with his performances, including Prince Ivan (Phillip Van Dyke). However, Ivan's advisor, Ludmilla (Catherine O'Hara), finds Bartok annoying and naive, and she tries to make a Cossack stop his performance. After Bartok's show, a bear suddenly attacks. Bartok saves everyone by stunning the bear, knocking it over, and trapping it in a wagon.