I've never seen Derpy as mentally handicapped. Clumsy? Of course. Cross-eyed? Definitely. But never a mentally disabled pony. If that were really so, then I suppose the same argument can be made for Pinkie Pie, Clumsy Smurf, Cookie Monster and just about every other children's TV character created for comedy relief in the traditional role of the fool.
Derpy is far and away among the most beloved ponies on the show (if not the most beloved) because of her wall eyes, cheerfulness and unbridled spirit. She's different, she knows it, and loves it anyway. Dinky probably knows she has a silly mommy, but one who is protective, loving, wiser than her appearance suggests, and clearly a fit mother.
In my developing fan art, Dinky is Derpy's adopted daughter, left on her doorstep as an orphaned baby filly. Everypony is pleasantly surprised to learn what a wonderful mom Derpy really is, and her trademark ditziness only adds to her parental charm.
Dinky was a 'delivery' that arrived at the Ponyville post office by mistake. While the Royal Equestrian postmaster general would come to sort out the situation, Derpy volunteered to look after the foal until he arrived. Dinky and Derpy bonded immediately, and after seeing the two of them together, the Postmaster General refused to separate them, stating that doing so would break his heart. Instead, he issued a new 'delivery order' which officially made Derpy Dinky's mom
...at least, that's the way MY version of the story goes
I just love derpy and dinkie, and the image works very well. The perspective is a little wonky with dinkies tub, which is facing straight towards us and the rest, which we are looking at at an angle. nevertheless, its a great picture and I do like the style. Well done.
this, is 2 cute!!!! loves it!! derpy, u are a good mom love it! this pic is just great! a perfect scene- derpy and dinky outside there house(?) derpy happily pumping water, and dinky having the best time ever with mama! i guess she enjoys bath time lol