Keldeo: I knew that many girls would fell in love with me because of my mane.But Rarity,what about that purple little dragon? Rarity: What? Spike: Yes Rarity! what about me?! Rarity: Oh dear... Me: You're in big trouble now!
You see, everyone Keldeo interacts with results in pain and misery. His parents died, his foster parents are in a wreck due to him suddenly disappearing to Equestria, and now Spike is suicidal over loosing his beloved. Now Rarity will soon be disappointed by him since he is actually genderless.