Final Fantasy VI/Espers

List of Espers, Their Summon Effects, Level Bonuses, Spells, and Locations
&sup1; Odin becomes Raiden

Ramuh, Kirin, Siren, and Stray
These Magicite are given to you by Ramuh in Zozo. These are impossible to miss, given that you have to talk to Ramuh to move the plot along.

Ifrit and Shiva
They can both be found at bottom of a pit in the Magitech Factory. To advance to plot, you must fight and defeat them. Once beaten, they yield their Magicite to you.

Unicorn, Maduin, Shoat, Phantom, Carbunkl, and Bismark
Shortly before leaving the Magitech Facotry, all of these Espers give their Magicite to you. You can't really avoid taking them.

Golem and ZoneSeek
These can both be found in the Auction house in Jidoor. You just need to buy them.

Sraphim
This Magicite can be bought from a kid in Tzen for 3000 GP in the World of Balance or 10 GP in the World of Ruin.

Palidor
After getting the airship in World of Ruin, return to Cid's Island, and you will find this Magicite on the beach.

Fenrir
After defeating Phunbaba in Mobliz for the first time, a kid will give this to you if you talk to him.

Tritoch
Go to Narche and go back to where you defended him before. Speak to him; fight him; defeat him, and the Magicite is yours.

Terrato
This can be found in Umaro's Cave in Narshe, simply search the skull there, and it's yours.

Starlet
Defeat Chadarnook in Owzer's house in Jidoor, and Owzer will give it to you.

Alexandr
Go to Doma in the World of Ruin and do the entire Cyan quest. At the end of the quest, you can find it in the throne room.

Phoenix
Go to the star shaped mountain range north of Tzen and land there. Complete the dungeon there, and Locke will give you this Magicite.

Bahamut
Find Doom Gaze while flying around in the airship. Defeat him without using any instant death spells (Break, Doom, X Zone, etc.), and it will yield this Magicite.

Crusader
Defeat all 8 dragons, and this Magicite will suddenly be given to you.

Odin and Raiden
Go to Farago and try to move the castle somewhere else. It will get stuck under the sand, and you can enter a new cave via a hole in the prison level. Go through the cave and enter the Ancient Castle there. Walk straight ahead and talk to the statue of Odin. It will yield the Odin Magicite. To get the Raiden, stand on the right throne, walk five steps down and press the A button. A secret passageway will open. Go down it, and you will find a statue of a girl. Talk to it, and the Odin Magicite will become the Raiden Magicite. Once you transform Odin, you cannot get it back, so learn any spells you want from it before "upgrading" it.

Ragnarok
Go to the Weapon Shop with Locke, and he will unlock the door. Inside, a man will ask you if you would rather have the sword Ragnarok or the Magicite Ragnarok. Choose the Magicite, and you'll have the Magicite.