Everypony thinks that the moon is a rock that Princess Luna simply controls. She herself thinks that too. But what they dont know is that a strange cat looms over Ponyville during the night. Will they figure out who this mysterious, devious cat is? Read and find out.
A rarity of a crossover, this might be interesting.
Princess Celestia definitely tries to hide the truth, I think
I oddly enough enjoy this. That cat always freaked me out as a kid and the song is so creepy.