Rainbow Ponies have multi-colored hair. They were a part of the general assortment available at most stores and came with a brush and 2 pony points.

Toola-roola
3rd Edition

Sew-and-so
3rd Edition

In early 2004, Fluttershy and Tink-a-tink-a-too returned from a previous issue. They now came without charms and had different backcard pictures, though they still had the same backcard stories. The ponies themselves had no distinct differences between editions. Toola-Roola and Sew-and-so were advertised as "New Friends." The ponies in this edition would sometimes come with 30 bonus stickers.

Cherry Blossom
4th Edition

Shenanigans
4th Edition

This edition remains harder to find, in particular Cherry Blossom and Shenanigans, because they are unique characters, unlike the reissues of Toola-roola and Sew-and-so (which show no distinct differences between editions). Cherry Blossom and Shenenigans were advertised as "New Friends." These ponies made up the last official "Rainbow Celebration" assortment, which would be replaced by the Perfectly Pony group in August of 2004.