The toy lines such as Neon/Gold/Pink and Ballerina use characters from existing main toy lines, and as such we've tended not to treat them as their own thing. This said, I would have nothing against a gallery or image category being created for the Ballerina set and suspect this would be helpful for Filly toy collectors, so a 'Ballerina images' category now exists!
Thank you for taking the time to ask!
(For the record, admin controls are only tight on the wiki because there were lots of spam edits by bots when they weren't. I do value the help of others in making this wiki its best!)