Talk:Pinkie Pie/@comment-24126585-20170716115012/@comment-24245960-20170716130040

Very doubtful. According to Wikipedia: "The earliest documented reference to the IPU was on July 7, 1990, on the Usenet discussion group alt.atheism." and also according to Wikipedia: "Following the original My Pretty Pony toy that was introduced in 1981, My Little Pony was launched in 1982 and the line became popular during the 1980s." so, given the gap of almost a decade between those two initial events, it would be more likely that the IPU is the parody of an MLP character.