Original Earth Pony, Fancy Pants Diaper Design:
The blue one has been found in a simple plastic bag package, distributed by Toysmith, Item #98348 Precious Ponies:
Blue:
Yellow:
Green:
Orange:
Magenta:
Pink:
Purple:
(tinsel hair variant from Australia)
White:
Flower diaper design:
Flocked: 
Original Earth Pony, Fancy Pants Diaper Design, Big Cartoony Eyes:
