The next three are minis, about 6″:
These are fakies of the 5″ Mini dolls.
There have been no official MLP/Lego crossovers, but in the land of fakies anything is possible!
These are based on the large talking princesses, but no electronics. Note that they retain the Hasbro markings on hoof.
DJ and Twilight’s pose is similar to the Friendship Duet singing Twilight Sparkle (and the same size).