Choppy and the Princess: Vol.5 (1967)

The law of the land in the Kingdom of Silverland decrees that only a male heir can succeed to the throne! When a daughter is born in the Royal household, the King tells his people that he has a son and must protect the secret from the court subjects!

At the age of 12, the lovable doe-eyed girl (Princess Knight) masquerades as a boy (Prince Knight) and together with Choppy - a protective leprechaun - gallops through the realm on a white steed confronting masked bandits, the ravenous wolf, sinister Duke Duralman the wicked neelon, and many more evil characters.

Episodes:

The Magic Spell.

The Princess Knight.