I remember reading that the Lickety-Split plush was released on her own first, and with her baby later. That would explain why the baby is much rarer. There are also two versions with different years on the tush tag, one has 1984 (but probably released 1985 like the regular pony), and the other has 1986 (and probably released that year, although MyLittleWiki claims it came out in Year 5/1987).