Strongly suspect that's a fakie, based on the rooted tail patch and eye/lip paint.  However, both she and the newborn fakie are definitely things MLP customizers would be very interested in - any G1 pose fakie really has value, because they're a perfect blank body to work with.

Early G4 was rampant with the 'mash-ups' - just be aware they're not actually prototypes.  Prototype implies test pieces requested by the designers or one-offs made for promotional material, while these are grey-market 'extras' sold directly from the factory without Hasbro's permission.  Don't think we have a proper accepted term for these ponies yet, unfortunately.

Too dark: Masquerade, Tic-Tac-Toe, Floater
Too orange: Creamsicle
Far too dark and not nearly pastel enough: Bubbles
Not pastel enough, and too lemony yellow: Baby Nightcap, Baby Splashes (purple hair)
Too muted/grey: Lemondrop, Baby Crumpet
Not quite warm enough: Posey, but otherwise quite close.  Tickles is even closer, but again a hair too cool a yellow. Twinkle Dancer & Baby Splashes (fading pink hair, european) same thing, not a warm enough yellow but otherwise a match.
Best Match: Baby Lemondrop (but beware, there are multiple versions of her. :C )
Ever so slightly not pastel enough / warm enough a yellow: Baby Lucky Leaf

Lemondrop may be a dubious evaluation given how much variety LD has over the years/issues.

If you have any ponies specifically you'd like compared, I can probably do that.

30+ year old hair rarely looks exactly like new, unfortunately.  It's just a fact of material science that colours fade with age, and manufacturing ingredients / formulae can also change.  Sometimes because certain raw materials become too expensive, or due to regulatory requirements.  Other times it's a lack of QA.  Dollyhair colours rarely are a perfect match in my experience to vintage G1's.

Huh, it shows up for me?  It's a G4 MLP: The Movie Twilight Sparkle and Spike pack, attempting to be sold for 4,000$. 

You can do vector gradients, but you may have to move to a dedicated vector application.  CS6 has limited vector features, I don't think it can do vector gradients directly?  I'd suggest Inkscape, since it's free.  Usually there's a separate tool for gradients; in Inkscape it looks like this:

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Purple glitter is a childhood pony, and I still have her buggy and some accessories.  One of the few ponies I remember picking out at the store. 

Grading is common for collectibles, but more prevalent with trading cards and comics.  That's the first MLP item I've seen graded.  A 9 is actually pretty good; 10's are not guaranteed even for absolutely pristine pack fresh cards (as an example), because it also accounts for things like centring and print quality.  It's a dubious investment of effort though when your target market of collectors don't really care about the pristine-ness of the outer packaging...