Images are copyrighted, whether they be from Hasbro or from fan works.
Doesn't matter if it is "tame" or not. Rules are rules.
If two kids get caught drawing on the wall, one kid isn't going to get off with nothing because he used pencil instead of permanent markers like the other kid.
"While the law may permit the fair use of a copyrighted work for such purposes as teaching, scholarship, research, criticism, comment, news reporting, etc., don't assume that all such uses are "fair." Fair use depends on a balance of four factors: the purpose of your use, the nature of the work, the amount of the work used, and the effect of your use on the potential market of the work. For more, see Indiana University's Copyright Resource Guide."
-Indiana University
Whether they fit in that area, I won't judge.
Listen to this person. This person is smart.
Give it some time. You'll see pages of it if someone like LittleshyFiM or someone like that goes down.
Still, it is copyrighted material.