If drawing someone else's character is art theft then the entire MLP fandom is made up of art thieves. You can't copyright fan characters, dummy.
Anonymous

No, red, but it is very immoral to lie and steal something that someone spent hours or even days creating. It doesn’t matter if it’s the art itself or an OC that someone already created and spent a long time developing said character.

I hold honesty to the highest regard so when somebody lies and says somehting that someone else spent a long time on is theirs, I get a little mad.