First, there's a D in TARDIS. Second, well duh. People make custom MLPs out of things they like. It's about getting creative and making a pony based on something or someone. They don't have to make sense. I found *AnimeAmy 's idea very cute. If you don't like others' art, okay. Move on. You don't need to comment rudely when the artist clearly worked hard in creating the pony.