Heck, I had never heard of them until a few years ago.
See, the original "My Little Pony 'n Friends" would air ten minutes of ponies, then ten minutes of "friends" (Moondreamers, Glo Friends, or Potato Head Kids)... in the US.
But when Israeli TV imported the show, it ditched the "friends" part, instead making 20-minute pony episodes by fusing two consecutive 10-minute episodes together (...which, to be frank, I consider an improvement). That's the reason why, growing up, I thought of "Magic Coins" as a two-parter rather than a four-parter...
...and why I always wondered about those weird potato-shaped characters I could see in the intro who never appeared in the actual show. XD