I think I would hover on the yes to being licensed mainly because of all the main 6 on the bottoms and the logo on the top. Licensees get a complete catalogue of poses, symbols, colours etc - its always possible they amended to suit the colour combo they were going for although that would be a bit naughty. Or perhaps this is a character we are yet to see? After all we knew about alicorn/pegacorn Twilight long before we were supposed to because of premature licensing material getting out.
Either way...these pjs are super cute! And thank you for sharing