Alright, this sounds flat out stupid, but I’m gonna attempt it anyway. I shall a list of pretty much every single villain in this picture!
 
All villains in this picture (L-R):
 
Main Group
 
King Sombra & Radiant Hope  
The Mane-Iac  
The Diamond Dogs  
Street Rat  
A Timberwolf  
Smudge  
Starlight Glimmer  
Cerberus  
Two Male Shadowbolts  
Hoops, Quarterback, and Dumbbell  
Dark Water Twilight Sparkle  
A Spider from ‘Luna Eclipsed’ on a Plundervine  
Babs Seed  
Discord holding Nightmare Moon & Queen Chrysalis  
Kydose(for some reason)  
Diamond Tiara & Silver Spoon  
One of those weird Gloom Clouds from the Comics(what was UP with that?)  
The Flim-Flam Brothers (with the Curative Tonic on Flam’s hat)  
The Cockatrice  
Snips & Snails  
Ahuizotl  
Some Changelings  
The Manticore  
The Great & Powerful Trixie w/ Alicorn Amulet  
Iron Will  
Garble, Clump, & Spear  
Pinkamena Diane Pie  
The Bookworm on another Plundervine  
Sunset Shimmer
 
Background Villains
 
On Land
 
The Unicorns from the Comics that tried stealing Rainbow Dash’s flight magic(I have heard their names are Goldmane, Decepticolt, and Zappityhoof)  
The Hydra  
Spikezilla  
The Tantibus  
The Tatzlwurm  
The Squizard  
The Aramaspi  
Lord Tirek  
The Chimera  
The King Timberwolf  
The Cipactli  
Ahuizotl’s Cats  
King Longhorn  
The Cragadile  
Dark Water Lyra Heartstrings  
The Ursa Minor  
Professor Flintheart  
Bad Apple on yet another Plundervine  
The Headless Horse
 
Flying
 
The Dazzlings  
Gilda  
That swarm of bees that attacked Seabreeze  
More Parasprites than anyone would be comfortable with  
A Vampire Fruit Bat  
Two Umbra (One of them is Rabia, but I can’t tell which one)  
Long Face  
Basil  
The Bugbear  
A Fruit Bat  
Reginald  
Discorded Rainbow Dash  
Screwball  
Midnight Sparkle(ponified)  
Lightning Dust  
Cirrus Cloud  
Two Wendigos  
Principal(or, I guess, Princess) Abacus Cinch  
Flutterbat w/ Angel Bunny on her head  
Gloriosa Daisy as Gaea Everfree(ponified)
 
On the floating pieces of land
 
Pony versions of Lord Voldemort from Harry Potter and the Evil Queen from Snow White  
Two Hamsters of Pygolia  
Antonio  
Kaa from The Jungle Book (seriously, they didn’t even try there)  
A pony version of Loki from Marvel’s Thor Comics  
Pharaoh Phetlock  
High Heel  
Shadowmane  
Zesty Gourmand  
Filthy Rich  
Buried Treasure and her Two Lackeys  
Gladmane  
The Yeti-Baboon Thing  
One of those monsters in the Scariest Cave in Equestria  
Buck Withers  
The Olden Pony  
Doctor Caballeron  
Rough Diamond  
Big Boy & Runt  
Larry the Shadowfright (right next to the Inspiration Manifestation book for some reason)  
Nightmare Rarity  
The Smooze  
Prince Rutherford  
Spoiled Rich  
Wind Rider  
A Cardboard Skeletal Pegasus wielding Nunchucks (I can’t believe I just said all that)  
Suri Polomare  
Dark Water Applejack  
Marine Sandwich  
Well-To-Do  
Prince Blueblood  
Nosey News  
Svengallop  
Dark Water Vinyl Scratch  
A Quarray Eel  
Upper Crust & Jet Set  
AND FINALLY, ‘Fluffy’ and one of his fellow Spider Pirates!
 
Whew, that was a lot to go through. Seriously, this show knows its way around a good villain, and they’ve given us plenty to enjoy! It’s like the old saying goes: “Every hero is only as good as their villain.”

wow it is a giant fanmade compilation of villains and it almost looks good  
i’m amazed

Alright, I’m just gonna say this right now:I seriously want this to be an actual poster for the next Nightmare Nights convention. All they’d have to do to make it plausible is replace Kydose with a changeling or one of the Pinkie Pie clones, and you’d have a very solid poster!…Oh, and you’d also have to find some way to incorporate the Mane 6 (the good guy versions, that is) to show that if this ever really happened, they would be screwed, and screwed badly.

Why is Kydose considered a villain? from what I have seen of him he seems like a nice guy. Or does he abuses Spike? considering he’s holding a picture of Spike in his mouth with a cross over Spike.

Seriously, why the fuck do people continue to think Pinkie’s season 1 moment means something evil? For crying out loud, Pinkamina is her birth name. It has no place here.

@Background Pony #7EE1: And that’s not who I was talking about. I was instead talking about Nightmare Moon, who is seen in this picture in Luna’s and Rarity’s bodies.
 
But with Twilight in consideration, then it would be two villains featured twice.

@Pepsi_Al  
Well, actually, Midnight Sparkle is an evil version of Sci-Twi, while the other one is the original Twilight infected by the dark water. They’re technically the same, but not really.

Nice, but took me a lot to scroll down the tags

This time, the magic of friendship won’t be enough…

@Background Pony #CFC2: And one of them is featured twice in the picture.

Okay, somebody needs to help me on this issue of “Where’s Waldo?”.

The more crowded it gets the more pixelated the vector’s borders get.

6 years worth of villains.

Oh, that’s why I can’t find Rarity  
She’s black :<
 
And in the background…

and the fucking oc is still here…

Look at that tag wall.