Ah, that's Lyra Rays! She's a Taobao oddball/hybrid pony, there were a bunch of them about in G4's heyday. Some were legitimate errors, but I've always suspected this particular "set" was made on purpose - WAY too many turned up for them to be made accidentally, IMO. (Especially since none of the Wedding Invitation ponies used the walking pose, and ALL of the hybrids did....) They're not fake, exactly - they come from the actual G4 factories - but they're also not official releases? They're odd little curiosities, basically. They were pretty popular back in the day, tho (I like them).
There were two other Wedding Invite hybrids that turned up at the same time... Holly Blue/Trixieshy who you can see
in my sig edit: below, and a Pinkie Pie/Cherry Berry hybrid (did we ever come up with a name for this one? Pinkie Cherry? I didn't see as many of her), there's a pic of her
here on My Little Wiki.
I think it was SoSilver that was selling a bunch of these at PonyCon one year? I remember someone had like a whole stall's worth of them.
edit: oops, I forgot I changed my sig xD Here's Holly:
visitors can't see pics , please
register or
loginShe was the UK PonyCon exclusive one year, I think it was 2013 maybe? They're the ones that dubbed her "Holly Blue", as in the butterfly. ^^