Posted about this on MLPTP too-
I recently got a G3 Twirlerina from a thrift store. I was doing a round of pony cleaning, scrubbed her with soap and washed her hair. When it came to condition and comb her hair out, her tail held up just fine. When I got to her mane though, the dark pink hair in her forelock just came right out. I was horrified. Two swipes and she's suffering from mare pattern baldness. The light pink in her mane - the same hair as her tail - was just fine. The tinsel in the dark pink part of her mane didn't come out, either. Just the hair.
I quickly went to grab the other Twirlerina I have, and yes, she too is suffering from exploding dark pink hair. I had never noticed this before. Is this a known issue with this pony?? I know there are some G3 ponies that are known to have poor quality hair that falls apart in time. I guess Twirlerina is one of them. Check on yours!