Locke Cole

A young thief--er, "treasure hunter"--who works for the Returners, a resistance group who fights against the Empire.

Edgar

Full name: Edgar Roni Figaro

The king of Figaro Castle. He claims to be allied with the Empire, but he is secretly working with the Returners. Fancies himself a ladies' man.

Sabin

Full name: Sabin Rene Figaro

Edgar's twin brother. Upon leaving the castle, he began to learn martial arts. He can even lift the heaviest of enemies in battle.

Kefka Palazzo

Emperor Gestahl's court mage, as well as one of his generals. Kefka is an ill-tempered, psychotic, sadistic, evil human being. It was he who placed the Slave Crown on Terra's head and had her kill fifty of his own men.

Discord

The spirit of chaos and disharmony. Discord once held Equestria in a grip of terror, until the two royal sisters used the Elements of Harmony against him, turning him into stone. When the spell wore off, Discord was free to do as he pleased once again... until Twilight and the others reaffirmed their friendship and petrified him once more. Thanks to Fluttershy, he's finally found friendship meaningful. But that doesn't stop him from causing trouble every now and then...

Sounds like you're getting a game plan lined up for the SNES trilogy.

Yep. As always thanks for your support.

Celes Chère

Once a trusted general of the Empire, Celes was sentenced to death for treason, but before her sentence could be carried out, she is saved by Locke.

General Leo Christophe

THE leader of the Imperial Army. Unlike Kefka, he treats his soldiers as human beings, not as expendable pawns. He could very well be friends with our heroes, if he weren't their enemy.

Emperor Gestahl

From his castle in the city of Vector, Gestahl makes his bid to rule the world with the power of the Espers. What will happen when he learns of magical ponies?

Seems we don't have "absolutely everyone" which is understandable. Every game has a large cast, both playable and otherwise. I'm getting a feeling the ones focused on will be the ones that have the most interaction with the ponies.

Shadow

A mercenary whose only loyalty is to himself and whatever he's paid. He comes and goes like the wind.

Cloud Strife

An ex-member of SOLDIER--Shrina's elite military force. He is now a mercenary under the employ of the eco-terrorist group AVALANCHE.

Tifa Lockhart

This lovely lady is Cloud's childhood friend, the owner of the Seventh Heaven bar in Sector 7, and a member of AVALANCHE. She is highly skilled in martial arts.

Barret Wallace

The leader of AVALANCHE, Barret has a gun grafted to his right arm after an incident involving Shinra, Inc. He has hated them ever since.

Aerith Gainsborough

A flower seller from the slums of Midgar. Since childhood, she has been pursued by the Turks, Shinra's intelligence agency.

Red XIII

Real name: Nanaki

A sentient wolf-like creature. He hails from another continent but was captured by Shinra at some point.

Professor Hojo

Hojo is the amoral, unethical head of Shinra's Science Division. Should the Equestrians come across this mad scientist, no doubt he would be interested in using them for his twisted experiments.

Jenova

Believed to be an Ancient, this being is stored within Shinra headquarters in Midgar, until it disappears mysteriously...

Sephiroth

The Great Sephiroth, as he was called in the past, was the strongest member of SOLDIER. He vanished five years ago, but now he has returned, vowing to control the Planet.

And~ now we get to the fan favorite. Hoo boy. I'd hate to know what thoughts Hojo would happen mind for the girls.

The Young Six

A group of different creatures attending Twilight's School of Friendship.

Sandbar

An easygoing and thoughtful earth pony. He also cares for plants.

Gallus

A blue griffon who was initially rude and sarcastic like most of his kind, until he got to know his fellow students.

Silverstream

A Hippogriff who's just as hyper and cheerful as Pinkie Pie. She is a cousin of Princess Skystar of Seaquestria.

Smolder

Sister of former bully Garble. Initially against the idea of friendship like Gallus, Smolder too opened up after getting to know her schoolmates. Like most dragons, she's fond of gems for food.

Yona

A yak who is quite clumsy, often tripping over her own hair. Speaks in broken English, or... Ponish like most yaks.

Ocellus

A shy changeling who often transforms to avoid social interactions.

Trixie Lulamoon

The self-proclaimed "Great and Powerful" Trixie. Due to a series of circumstances, she became an ally of the Mane Six as well as a close bonding with Starlight Glimmer.

Squall Leonhart

A recent member of Balamb Garden's mercenary group SeeD, Squall finds himself on a mission to fight against a powerful sorceress.

Quistis Trepe

A SeeD member and an instructor at Balamb Garden, until circumstances caused her to be stripped of her instructor's license.

Selphie Tilmitt

A hyperactive girl who recently transferred to Balamb from another Garden. Selphie loves trains and wields nunchucks in battle.

Zell Dincht

Zell is an energetic, and loud, individual who uses his fists in combat. He's also quite knowledgeable about certain places.

Irvine Kinneas

Elite sharpshooter from Galbadia Garden. Claims to never miss his target.

Rinoa Heartilly

Compassionate and friendly, Rinoa is easy to get along with. She makes a request for SeeD to help her and her resistance group fight against Galbadia, but little does she know that there's more to this mission than what it appears.

Seifer Almasy

As Squall's rival, Seifer clashes with him on several occasions; he recently gave Squall a scar across the face, and received his own in return.

Sorceress Edea

Appointed by President Vinzer Deling of Galbadia as an "ambassador for peace," Edea's goal is to gain control of the nation and conquer the world.

Ultimecia

A powerful sorceress from the future. She plans to achieve time compression.

Tirek

An evil centaur with the ability to steal ponies' magic to increase his own power. Whatever world that is filled with magic is in danger as long as he is present.

Definitely feels like Tirek Is it going to become a big deal.

Zidane Tribal

A member of the theater troupe Tantalus, the monkey-tailed Zidane is tasked with kidnapping the Princess of Alexandria and bringing her to Lindblum. Little does he know he is in for the biggest adventure of his life.

Vivi Ornitier

A shy and timid black mage. He finds himself teaming up with Zidane after a series of mishaps.

Adelbert Steiner

The stubborn, stocky Captain of the Knights of Pluto. Steiner does not get along well with General Beatrix who is the almighty leader of Alexandria's military. He has a black-and-white view of the world, bringing him into conflict with Zidane.

Freya Crescent

A dragon knight/dragoon from the Kingdom of Burmecia, Freya is first encountered in Lindblum just in time for the Festival of the Hunt. She is on a journey to find her lost love...

Princess Garnet/Dagger

Full name: Garnet Til Alexandros XVII

Heir to the throne of Alexandria, Princess Garnet is a warm, kind, and naive young woman. Upon hearing stories of her mother's wrongdoings, she seeks to escape the castle.

Eiko Carol

A rambunctious six-year old girl, Eiko is a summoner hailing from Madain Sari. Is often seen with her pet Moogle, Mog.

Queen Brahne

Full name: Brahne Raza Alexandros XVI

The reigning Queen of Alexandria. She's... not exactly the fairest in the land, to say the least. Sometime after the king's death, Brahne underwent a complete change and began to wage war against the entire Mist Continent.

Kuja

A vain, effeminate man whom the group firsts sees at Burmecia at Brahne's side. Kuja is the one supplying the queen with living magical weapons, but he has more sinister ambitions in mind.

Well there we go as far as the PS1 trilogy goes. I kind of do notice that every console generation seems coming sets of three, but that kind of ended with 13 unless you count the fact that that story became a full-on trilogy itself.

Sunny Starscout

Hailing from Maretime Bay, Sunny sought out to restore peace and harmony to Equestria. Now she and her friends find themselves in a political struggle in the Ivalice region.

Izzy Moonbow

A unicorn specializing in arts and crafts, Izzy is Sunny's first non-earth pony friend. Her optimism could be in danger due to the War of the Lions.

Princess Zipp Storm

Full name: Zephyrina Storm

Princess of Zephyr Heights. Like Rainbow Dash, she is a fearless thrill-seeker.

Princess Pipp Petals

Zipp Storm's younger sister, and a lover of the spotlight who can sing and dance. She's a bit absent-minded at times, but her heart is in the right place.

Hitch Trailblazer

Childhood friend of Sunny and the sheriff of Maretime Bay. His commitment to his duty has earned him respect from the city's residents.

Ramza Beoulve

The second youngest child of the noble Beoulve family. He finds himself in the middle of a conflict dividing Ivalice into two and is one the verge of discovering a great evil from behind the scenes.

Delita Heiral

Once a lifelong friend of Ramza's, Delita severs his ties with the Beoulve family after his sister is killed. Whom he sides with is unknown.