This is AeroJab's (KleanOrDerty/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://derpibooru.org/tags/artist-colon-dertikleen
https://derpibooru.org/profiles/DertiKleen

Go here if you want to see their regular artworks: https://e-hentai.org/g/3586910/e95c8f1fcf

Artist Links:
https://www.deviantart.com/aero-jab
https://www.furaffinity.net/user/k-or-d
https://www.furaffinity.net/user/aerojab
https://www.furaffinity.net/user/kleanorderty (Dead)
https://www.furaffinity.net/user/zen-hydro (Dead)
https://www.deviantart.com/aj-rock (Dead)