Pinkie Pie in this image is looking like Pinkie would. Happy and silly. Though her mane is a bit weird in some places, like some curves not correctly curvy. I do like the shading, makes it more realistic, whilst still keeping the pone feel.
The sweater, cute colour and cute style. But the waist band is not rounded enough and looks plastered on more than put on, sorry to say.
Then we have the star of the show, Gummy. The stripes in his eyes are a bit lazily done. They should go rounded-like, but on this picture, they are just random stripes. The shading on him is not as impressive as on Pinkie, but I like him as he is.