Cloudtail
Take him to the park and lay down in the grass. Tell him you wanna guess what all the clouds look like, if he protests FORCE HIM TO. Look until you find that one perfect cloud and say, "OMG! CLOUDTAIL THAT LOOKS LIKE YOU! OMG!"
Tell him Brightheart dumped him for Firestar. Watch with pleasure as he screams in fury and starts braking things.
For his next Birthday give him a cake in the shape of a cloud that has cute eyes and a mouth on it.
In the middle of the night, take him out of his bed and stuff him with poppy seeds so he won't wake up. Brake into a Twoleg home and throw him in the dryer. When it's done, take him out and comb his fur straight all exept for his puffy tail. Draw a cute girly face on it. Return him to his bed and watch him scream his little heart out when he wakes up.
Put red paint all over Spottedleaf's eye and replace her with Brightheart in the middle of the night. Then watch Cloudtail freak out when he realizes that he has just licked a Medicine Cat.
Dress him up as a cloud for Halloween.
Tell him that he was actually Tigerstar's son.
When he doesn't believe you on number 7 during the middle of the night put amber contax in his eyes and paint black stripes on him. Watch him screech his voice out when he wakes up.
Tell him that when his mother gave him to Firestar it was a accident and she actually meant to give him her other white kit.
Ask him if he would want to go out to eat with you. When you force him to say yes at gunpoint take him to a Tofu resteraunt and make him order something off the menu and tell him it's fish. When he gets his order and he takes a bite watch with pleasure as he chokes to death on it