Melmo and a Magician
Melmo is brought out to appear in a magic show. But becoming angry at the deception of the magician, she uses the magic of her candies and startles him. Watching Melmo's excessive use of candies, God decides to punish her a little. Completely unaware, the magician coerces Melmo into teaching him the magic of how to transform. He has already snatched Touch. Melmo succeeds in transforming herself into a dog and rescuing Touch, but she cannot return to being herself because she is being punished by God. Source: tezukaosamu.net
Aired 09/01/1972EP 15 - Melmo and a Magician

Fushigi na Melmo
After nine-year-old Melmo loses her mother in a car accident, she is left to care for her two younger brothers, a task far beyond her age or means. However, in the midst of her grieving, Melmo is visited by the ghost of her deceased mother who gives her a bottle of miraculous candy, capable of transforming her into either an adult (blue candy) or an infant (red candy). A combination of the two can reduce her to a fetus and then change her into any animal she imagines. Drawing on a seemingly inexhaustable supply, Melmo uses her candies to solve the various problems thrown her way, aided by her younger brother Toto (who accidentally morphs into a frog in episode 7) and her cantankerous mentor, Dr Nosehairs.
(Source: Anime News Network)