The figures are sold through Hot Topic, and are sold separately You can purchase them on the actual hot topic site, but Hot Topic is one of the sites where you can also purchase through Amazon which is linked above. These figures are 15 dollars a piece, however they are well worth the price and are bigger then the brushable ponies.
As you can see above, these figures are a lot bigger then the standard g4 ponies you can get for 5 dollars at many stores. Not only this but the ponies are solid, making them quite a bit heavier then the usual pony toys you can get. These ponies are made by one of my favorite companies for figurines, they are made by Funko who makes a variety of pop culture bobbleheads and pop figures out of vinyl. This alone hints that there may be more My Little Pony items coming from this company, as they often do multiple things for a fandom it gets the license to do.
These ponies are beautifully made, especially for a company that doesn't normally do ponies though Funko's stuff is always wonderfully made. They designed the characters well making them fit the actual characters well, it is rare for Rainbow Dash's mane and tail to be correct but they did an amazing job for them. Not only that but instead of just going with the same exact mold for both ponies as many toys end up doing, they went with different molds for their hair to keep things closer to the actual characters. Derpy's eyes on this are done in the same fashion as in the show, with one being centered up while the other is centered lower to give her her signature look.
It truthfully is very hard to find any complaints about these figures. One of the few I have is the fact their heads do not turn at all, making it hard to see derpy's eyes unless you settle for not seeing her cutiemark at the same time. Also the fact that its rather easy to see many of the seams in the plastic, including the one on her head showing her head is actually two different parts. Another personal thing I would have liked to see is the My Little Pony log on one of the hoofs as all ponies have, there aren't any marks on the pony besides a small item number on a hoof.
These ponies are amazing addition to any pony fan's collection, however I am not sure these would be a good pony for a young one to have because of how hard it is. I would imagine they would have more fun with a brushable pony then with these figures, but it all depends on how old your child is and what your child wants.