For now, I'm mostly interested in G1 ponywear. I don't mind buying a full set if you don't want to separate the pieces.
Here is what I'd like to find.
Megan and Pony Wear
By the Sea : megan swimsuit, megan glasses
Ice Princess: megan pants, pony coat, pony skates
Picnic in the park : Megan dress & shoes (pending)
Sweet Dreams : megan shoes
Costume Wear
Rock'n the Night Away: headband