Super Sailor Mini Moon, Queen Nehelenia and others in “Unfinished Business”

Huh?

[narrating] A long ago, there was a kingdom on the Moon. It was happy and prosperous place, where everyone had a good life and it was called Silver Millennium. For many years this rich kingdom was ruled by a queen called Serenity. And not too far away there lived another queen, who seldom watched this thriving moon kingdom from quite a different place. From her cold, dark planet, she envied everything about the glittering Moon Kingdom. And dreamed of claiming it and ruling over this bright, happy kingdom as her very own one day. Then this Queen of Darkness luckily happened to discover about a mysterious stone that held overwhelming power. And she knew that with that power the Stone possessed, she could take over Serenity's throne of the Moon Kingdom, and she could even rule the entire universe. The stone known as the Golden Crystal. Was kept by a young boy, in a hidden and sacred place on Earth. Because it held amazing power, it was hidden very carefully, so no one could ever find it and use it.

Ah!

Once the Queen of Darkness learned that a young boy was protecting the Golden Crystal, not only did she crave the Crystal but she believed that boy was the key to the Crystal's power. So she wanted the boy, too. She offered him the chance of a lifetime. She suggested to him that they share the power of the Golden Crystal and use it to conquer the universe together.