Why is this question asked every single week since the dawn of pony?
Seriously it's just because she is cute and popular and perceived as highly sought. She is not particularly rare.
I have no idea. This has been going on since I got online back in 1997, that's 18 years of the same questions.
I have no idea why she is so 'wanted' - people were talking about this way back at the first pony meet I ever went to back in 1999/2000. There were even collectors who made up silly websites about the shrine of holy mimic or, honestly it's been 18 years I don't remember all the nonsense at this point.
Back in the day we didn't have this resource of pony information that is out there today. A lot of the people who are collectors today were just 2-5 year olds back then.
I myself was a much older collector, starting in 1983/84ish - so I would have been around 11 or 12 when I started collecting. So I knew about all these ponies, I was kind of dedicated from the start. So as far as USA pony stuff goes, I was intent on getting all the ponies.
But a lot of collectors were just little kids who didn't always have access to everything available, they might not have always been aware of how many ponies were out there.
I remember one fellow collector I met saying she never saw mimic and wasn't aware of the pony till she got online as an adult.
A lot of little kids wouldn't have kept the backcards and all that stuff. So many kids who opened they're ponies, who didn't keep the paper materials may have never seen the other ponies. This was back in the day when there wasn't a walmart in every town and some people didn't take a trip to the store every day, waiting on toys to come out.
It isn't like now, where everything is online and we know about the 'new' toys coming out. You didn't see the toys until they showed up in the store or you saw the commercial on tv. Remember back when there were only a couple channels, you didn't have a billion TV channels and we certainly didn't have any dedicated to just cartoons and showing kids programing/commercials.
So I don't think it has anything to do with Mimic being any rarer or limited compared to the other 5 twinkle eye ponies in her particular set.
It has more to do with this being a kids toy, and back in the day you were depending on 5 year olds to know what to buy, when and why and keeping up with that information.
With today's collecting, it's vastly different. We can go online and find out what is new coming out. There are also many more stores where we can find ponies.
But for me, there is nothing HTF about Mimic - I bought her at k-mart for under $6 - she was $5 something I can't remember the exact cent amount. I'll have to scan the backcard front that has the price on it :p
The things that make her unique are per pose - there are only a few uni's in this pose - her color combo and the fact that the original cartoon had an episode about her. A lot of these things add to her mystique. But I don't really believe she is limited, we see her a lot, for sale and in people's collections.\
Mimic simply seems like she's become a sort of status symbol, it's more of a pony people want to buy/own to say Hay, I have a Mimic - I'm an official collector now.