This list does have reformed villains on it as well as characters that are counted as villains by people.

Earth Ponies

Spoiled Rich (G4)

Diamond Tiara (G4)

Suri Polomare (G4)

The Mane-iac (G4)

High Heel (G4)

Phony Pharaoh or Pharaoh Phetlock (G4)

Shadowmane (G4)

Buried Treasure (G4)

The Hooffields & The McColts (G4)

Dr. Caballeron (G4)

Gladmane (G4)

Marine Sandwich (G4)

Svengallop (G4)

Antonio (G4)

Teddy (MLP Tales)

Ace (MLP Tales)

The Headless Horse (G4)

The Olden Pony (G4)

Rough Diamond (G4)

Pegasi

Wind Rider (G4)

Lightning Dust (G4)

Long-Face (G4)

Flutterbat & Opposite Fluttershy (G4)

Queen Trottingham (G4)

Shadowbolts (G4)

Unicorns

The Flim Flam Brothers (G4)

King Sombra (G4)

Starlight Glimmer (G4)

The Great and Powerful Trixie (G4)

Zesty Gourmand (G4)

Snowfall Frost (G4)

Nightmare Rarity (G4)

Prince Blueblood (G4)

Tantabus (G4)

Shadow Lock (G4)

Alicorns

Nightmare Moon (G4)

Daybreaker (G4)

Crystal Ponies

Sombra Soldiers (G4)

Humans (These count the villains from the EQG movies that are from Equestria)

The Dazzlings (Adagio Dazzle, Aria Blaze, & Sonata Dusk) (G4)

Principal Cinch (G4)

Gloriosa Daisy (G4)

Sunset Shimmer (G4)

Sci-Twi/Midnight Sparkle (G4)

Filthy Rich (G4)

Witches from the Volcano of Gloom (Hydia, Reeka, and Draggle) (G1)

Beezen (G1)

Somnambula (G1)

Flame Wizard (G1)

Jewel Wizard (G1)

Star Stealer (G1)

Wizard Wantall (G1)

Zelda (G1)

The Ice-Cream Witch (G1)

Summer Witch (G1)

The Mad Magician (G1)

Murky Water Witch (G1)

Sea Wizard (G1)

Crow Queen (G1)

Wind Wizard (G1)

Dragons

Garble (G4)

Basil (G1 & G4)

Whimsey Weatherbe (G3)

Barry (G4)

Reginald (G4)

Bird like villains

Gilda (G4)

King Charlatan (G1)

The Raptorians (G1)

Other Animals

The Diamond Dogs (G4)

Squizard (G4)

Catrina (G1)

Queen Bumble (G1)

Squirk & Crank (G1)

Princess Porcina (G1)

Zeb (G1)

Grogar & Bray (G1)

The Gizmonks (Gock and Gluda) (G1)

Crunch the Rockdog (G1)

Well-to-Do (G4)

King Longhorn (G4)

Monsters

Ahuizotl (G4)

Queen Chrysalis (G4)

Discord (G4)

Iron Will (G4)

Tirek (G1 & G4)

Scorpan (G1)

Rep (G1)

The Smooze (G1 & G4)

Ahgg (G1)

Arabus (G1)

King Lavan (G1)

Niblik (G1)

Megatron (G1)

King Anubis (G4)

Bugbear (G4)

Chimera (G4)

Big Boy and Runt (G4)

Smudge (G4)

Goblin Glade (G1)

Horrible the Ogre (G1)

Red Cloud (G1)

Sycamori (tree troll) (G1)

Grumpy Goblin (G1)

Giant Eatall (G1)

Plants

Gaea Everfree (G4)

The Flores (G1)

Plunderseeds (G4)

Weird Wood (G1)

If I missed any please tell or give me a picture of the villains to put on the list.

Wow, really cool list.

Seems like Pegasi get the least love and Unicorns get the most power when it comes to villains.

5599192 And the Earth ponies have the most number of pony villains out of the 3.

Awesome! You got all of the previous villains and the ones to date! ;D That's a lot of commitment! :D :) Good job, and nice work!

5599277 I just added one had forgot about he's on the bottom.

5599309 XD I didn't know he was in Equestria! Thanks for adding it! ;)

5599309
Here some villains that you forgot to add:
King Anubis from the #24 issue of the MLP comics:


Cipactli the monster from the Stranger then Fan Fiction episode:

Well-to-Do from the #27 issue of the MLP comics:

That all the villains I can find at the moment but I might find more later.

5599830 I'm not adding Cipactli.

TMW a user from the blue does a better job than you.... gg

5612384 Should I add any villains I forgot to put on the list?

5614453
Yes, we have a new villian.... Celestia's dark side: Daybreaker!

(Also, you might want to check some of the old images because some of them only show a broken link.

5999173
Yeah I know about the pictures. I don't remember where to find them.

5999174
Try derpibooru.

5999174
Also, you might wanna put short descriptions below the images, specifically the villians from the older generations.

5999176
Couldn't find one for Summer Witch. But I did find a lot of them.

5999187
Ok, also I found a list descriptions.

5999198
It's 4:40 am where I am at. I don't a have time to put those in right now.

5999198
I just added a new category of villains.

What about Cozy Glow?

5599128

Sphinx - The giant monster of the past that had kidnapped a prince, her current whereabouts and fate are unknown as she was last seen fleeing from the pyramid after Somnambula beat her challenge, last seen in season 7/episode 18 - Daring Done?

Sable Spirit- A tyant that valued buity above all else, was latter defeated by Mistmane, appeares in season 7/episode 16- Campfire Tales

Goldcap, Decepticolt, and Zappityhoof- A trio of witch like Unicorns that stole Rainbow Dash's wings, they had planned to melt the wings down for a potion that they belived would turn them into Alicorn's, only appeared in Friends Forever Issue 25

Cozy Glow - like her or hate her she is a major villain in the last two seasons