It would help to post to this thread what effects will be happening to which characters :]
Equines: All manes and tails have become colorful frosting that disperse multicolored sugar sprinkles when you run, making everything taste much sweeter. Be sure you don't get a stomach ache!
Pegasus: All wings are white and feathered and a glowing halo of gold mist hovers above your head. What adorable angels you are!
Unicorns: All horns have all become antlers and muzzles a glowing red. Will you be leading the sleigh tonight Rudolph?
If your name has an L in it: Your coats have been made appaloosa and the spots glow different colors at night. Please don't run up the electric bill!
If your name has an S in it: Your coat has turned red and your mane and tail is white. Your belly also seems rather large and it seems to wiggle like a bowl full of jell-o.