There are labtest results to support that the pink swirls are around 90mg of MDMA. One dodgy batch (the green ones) are mephedrone. I tried the pink butterflies recently in Belgium and absolutely no doubt they were MDMA. Maybe you got a copycat batch in Ibiza, but your the first person I've heard to say they were fakes.
We all took them on our first night, I had been to Centerpoint the weekend before (Paramount, for Desert Island Disco in London) & the pip memory was fresh in my head, which is basically me getting really hot & cold whilst laughing a lot, and my other friend being really sick despite only having a few beers. Then in ibiza the same thing happened. I took them back for a refund as I got them off a known person.
We got white swirls after that which were like doing half a normal pill and even doing 3-4 wasn't that strong
Then I bought a lump of crystal that was hard as fuck, really brittle & grey/blue. To be honest when you're out in Ibiza & you want to get high on a big night like Cream that you've been looking forward to all year, I'm less bothered about scrutinising what I've got if it's all that's available. The rock thing that we ground up and bombed was very very similar to mandy in effects but not totally the same, like 75% the same, rushy, fucked up, no empathy, no love, but still found myself shuffling around on tip toes in the apartment & having loads of really weird trippy moments, especially after smoking a spliff or 2!
Still had a good time overall but now getting pretty keen for the good stuff to come back, it's never been like this since I got involved 15 years ago. I'm really struggling, haven't seen anything good, also got my stag do to Creamfields next year in August & the annual trip to beefa in July, it had better be sorted by then!