Martinko is a Russian short film from 1987 by Eduard Nazarov that adapts from the story by Boris Shergin.
This article contains details of the ending and/or a surprise plot element.
The princess Raiska has eaten a red apple - one that causes her to grown branches out of her head. Disgused as a doctor, Martinko visits Raiska, who is in bed with two gigantic branches. Having collected four green apples, which make whoever eats them more attractive, he offers one to Raiska. The branches fall fly off of her head, so she runs over and bites another one. In just a couple of seconds, she gains weight and her skin turns into a healthy-looking color, thus making her bigger and more beautiful. Martinko removes his disguise and the two are married soon after.