Sweetie Swirl
From My Little Wiki
First released as an international blind bag pony. She also appears to be the bonus pony with Rarity's Carousel Boutique
Rarity's Carousel Boutique
The pink unicorn that came with Rarity's Carousel Boutique has no official name; however, she is generally known as Sweetie Swirl due to her resemblance to the Blind Bag pony of the same name.