 When they're happy (without the Crystal Heart), their manes and tails revert to different styles, their ears are up as normal, and their coats have a brighter hue.Additionally, mares get their decorations on their heads/hair.When in a more jubilant mood (with the Crystal Heart fully powered), all the Crystal Ponies retain their "happy mood" form and their bodies magically transform into a translucent crystallized form.