British toy store Argos has a 20 inch/50 cm plush Pinkie Pie for sale on their site. She’s the same as the 11 inch and 5 inch ponies available in America, just a much larger size. She’s on sale for 24.99 British Pounds.
The mysterious Princess Skyla is also now listed on Kmart.com for $19.99, though she’s noted as unavailable. She comes with a pink blanket and her tiara, and her image on the packaging is a recolor of Sweetie Belle. Her head is the same mold as So Soft Newborn Sweetie Belle, so this is not too surprising.
It’s important to note that Kmart.com has a history of sending an item differently than what’s pictured, so you might get a different So Soft Newborn if you order her. There is also no confirmation on whether Skyla is a show character or a recolor like most of the brushable playful ponies.