Due to how annoying it is to be defeated, an affably evil lich decides to give up the evil business and just wile his days away doing absolutely nothing. The good guys don't really see this.
Evil cosplaying humans go on a road trip round Equestria.
A man discovers the Kraahkan and gains the powers of Makuta. After 4,000 years in Tartarus, he gains the form of Teridax as well.
Fifty things that Ponyville citizens are forbidden from doing. Basically, crack and noodle incidents. One shot.
A wizard whose power comes from his muscles enters an anthro Equestria. He casts Magic Fist.
Twilight is asked why you can't teleport bread; she delivers a tale of bready tumours and monsters.
Mr. Howtobasic teleports to Equestria and smashes eggs a lot.
A mass crossover of the League of Humans acting Villainous. Rather than being sent to separate Equestrias, the villains are sent to one. How will events play out with sixteen villains all in one place?
An insane man dressed as Doctor Weird appears in Equestria; shit happens in the past. Set in the LoHAV.
CGoTG story. A man is killed, then resurrected to fight for Gravelord Nito in Equestria.
In an anthro Equestria, a man is transformed into Senketsu and spawns many Kamui.
An argument with a brony sends a fat guy dressed as a monk to an anthro Equestria, where he enjoys the good things in life.
A human medium dies in Equestria and wants revenge against his killer.
A university girl is sent to Equestria's past and discovers her lycanthropy and magic.
A cosplayer going as Link gets sent to Equestria as an unpredictable force