This is KleanOrDerty's (Zen-Hydro/AJ-Rock) MLP artworks back when they did a alot of work drawing them.
Here's where you can see his pony work: https://za.gl/6w16u8

Go here if you want to see their regular artworks: http://dl.hentaiknight.work/?l=e-hentai/g/3097943/4a9073aa61

Artist Links:
https://elii.cc/kguqt
https://ouo.io/5xAUPV (Dead)
https://oei.la/nwj8jmC (Dead)