Perla is a stand alone like Rayito.
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There are a few stand alone piggies:
- Perla - pink body, white hair, pink circles
- Rayito - orange body, yellow hair, red fireworks
- Algo--- (sorry I can not remember the correct spelling of this one!) - white body, blue hair, blue clouds
- (need to check name) - pink body, blue hair, pink flowers ...this is not a Blossom variation. She has a unique name on her card.
- Fresita - dark pink, white hair, strawberries (I think I spy this beauty in your pictures).
There's a Spanish collector who is active on the Arena who owns almost all of the piggies including each symbol variation. She has many of them MOC as well.
I'm not sure about editing the Wiki. In the past I donated a few pictures for it, but I never signed up to make edits. That seems potentially dangerous if anyone can make edits & there's no control over who us adding and deleting. It may also explain some if the incorrect info.
I don't know of a good site for piggy info. I've picked up what I know from collectors who have first hand knowledge from childhood collections and MOC ponies. I've been interested in pony variations around the world since the early days of the online community, so I try to make notes of useful info when I find it from a reliable source.