Cosmic Clone

Cosmic Clones are strange humanoid, possibly shapeshifting, shadow-y creatures that mimic the form of human beings, specifically one named "Mario". They have visited various galaxies, but their native galaxy (if they have one) is unknown.

Behavior
Not much is known about these creatures, but what is known is their behavior differs depending on what comet they are produced by.

Cosmic Comet
When produced by a cosmic comet, cosmic clones mimic the form of the person visiting a galaxy and challenge them to a race.

Clone Comet
When produced by a clone comet, they seem a bit more aggressive. They still copy a person's form, only in this instance, they mimic the movements of the person they're following. Possibly as a hunting method, implying they're a predatory species.

Biology
Their bodies are made up of what is known as "Cosmic Matter", which, despite its name, appears to be more like energy than actual matter. When produced by a cosmic comet, they have a distinctly blue appearance which a starry texture. When produced by a clone comet, they have a more black and red, or black and purple coloration and yellow eyes. They are often considered genderless, though humans sometimes assign genders to them based on the person they resemble.