Just remembered a funny assumption I made as a child. Thought I should share.
I was born in the mid-nineties and thus grew up with the G2's, and loved them dearly. Since I loved My Little Ponies very much my parents got me pony movies too - one in my native languange (where something happens with a stone in Flutter Valley or something...? I really should watch it again if I knew the name
), and The Movie in a languange I didn't know (and it's only recently that I watched it again and was like "Oh, so THAT's what it's about!
), and both were starring flutter ponies.
I loved the Flutter Ponies. But of course these movies are G1, but I didn't know that
And some of my ponies HAD to be Flutter ponies. I don't remember how I made this assumption, but eventually I figured the flutter ponies were the ponies with tinsel.
So all G2's with tinsel = FLUTTER PONIES
...
... So I guess their wings are just invisible.
(All the "changing tails" were also alive. Bubble's yellow tail was like her sidekick
)