List of final bosses

A Final Boss is the last boss in the main quest of the game. After its defeat, it is usually followed by a cutscene as an end to the main story. A common theme among the Final Bosses is that they want to destroy everything and return the world to a state of nothingness.

Final Fantasy
The Final Boss of Final Fantasy is Chaos. Having been killed by the Light Warriors in the present, the chaos fiends sent Garland 2000 years back in time. Here, he absorbs the powers of the fiends and becomes Chaos, starting the whole cycle of death all over again. It is not until the Warrior of Light travel back in time and kill Garland once and for all that the spiral finishes.

Final Fantasy II
The Final Boss of Final Fantasy II is the Emperor. Having been killed by Firion and Co, the Emperor was sent down to hell. Here, his soul managed to absorb the dark energies, and he was reborn as the king of Hell. Travelling to the capital of Hell, Pandaemonium, the party fight the Emperor, finally destroying his soul forever.

Final Fantasy III
The Final Boss of Final Fantasy III is the Cloud of Darkness. Fearing his own mortality, Xande needed to freeze time so he would never die. To do so, he created an imbalance in light and darkness. This imbalance summoned the Cloud of Darkness, whose sole purpose is to return everything to the nothingness from where it came. After killing Xande, the Light Warriors travel to the World of Darkness, where they team up with the Warriors of Darkness and stop the advancements of the Cloud of Darkness, restoring the balance once more.

Final Fantasy IV
The Final Boss of Final Fantasy IV is Zeromus. It is the embodiement of Zemus' hate, created upon his death. It uses this hate to try and destroy everything in its path. However, the player party overcome it eventually, causing it to fade into oblivion. This cannot fully defeat it, for as long as there is hatred, he shall exist.

Final Fantasy V
The Final Boss of Final Fantasy V is Neo Exdeath. No longer able to control it, Exdeath is absorbed into the Void himself, and fuses with it. Here, he becomes a fusion of everything the void has taken, and he states he wants to absorb everything. The party defeat him though, and with the help of the Dawn Warriors, they close the Void once more.

Final Fantasy VI
The Final Boss of Final Fantasy VI is Kefka. Using the power of the Warring Triad, Kefka decides that it is mankind's destiny to be destroyed, and so begins obliterating everything he sees. The player party attack, defeating him in several forms. He is finally killed, and the party make their escape. Outside, mankind begins to rebuild, resisting what Kefka deemed their fate.

Final Fantasy VII
The Final Boss of Final Fantasy VII is Safer Sephiroth. Sephiroth, after multiple confrontations, heads to the center of the earth to absorb great amounts of Mako.

Final Fantasy VIII
The Final Boss of Final Fantasy VIII is Ultimecia. Having compressed time as much as possible, Ultimecia revealed herself as this monstrosity. Wanting to compress time now so that she may be the only thing in existance, the party fight her. She is eventually defeated, causing the party to get lost in a weird compression of times. However, by managing to stay close to each other, the party manage to return to normal time safely.

Final Fantasy IX
The Final Boss of Final Fantasy IX is Necron. Since Kuja had destroyed the crystals, the very source of life, Necron decided that mankind was now ready to accept its ultimate fate, a return to absolute nothingness. Zidane states that that's not the case, that as long as people have a will to live, life will continue. Necron wants to test this, and fights the party in a final battle. He is defeated, but as he fades away, he claimes that he is immortal, that as long as there is life and death, he shall remain.

Final Fantasy X
The Final Boss of Final Fantasy X is Yu Yevon. Having travelled into the depths of Sin, the party fight Yu Yevon in a place similar to the Farplane. After drawing him out into the open by using the Aeons, Yu Yevon is defensless, and is killed easily, and Sin along with him. However, the ultimate price is paid, and the Fayth stop dreaming, ridding the world of the Aeons forever, as well as Tidus.

Final Fantasy X-2
The Final Boss of Final Fantasy X-2 is Shuyin. With Vegnagun destroyed, Shuyin attacks the Gullwings directly. His fighting style is identical to Tidus', but he is easily defeated by the girls. Upon his defeat, the spirit of Lenne leaves Yuna's body, soothing the vengeful spirit once and for all.

Final Fantasy XI
The Final Boss of Final Fantasy XI is the Shadow Lord. Residing in Castle Zvahl, the Shadow Lord commands all the Beastmen to attack the three civilized nations, thus beginning the Crystal War. In truth he was a normal Galka named Raogrimm, manipulated by the Zilart princes.

The Final Boss of Rise of the Zilart is Eald'narche. Wanting to open the gates to paradise, he tries to stop anyone who would hinder his plans. Eldest of the two Zilart princes, he uses his mind reading abilities and start the Crystal War by manipulating the Shadow Lord. Defeated when he attempts to open the gates to paradise by destroying Vana'diel.

The Final Boss of Chains of Promathia is Promathia. The Lord of Chaos, he is chained and bound, completing his reign when Nag'molada, a Kuluu who longs to become a Zilart, wishes to learn the truth of creation. Defeated with the combined efforts of Prishe, Ulmia, Selh'teus, and others.

Final Fantasy XII
The Final Boss of Final Fantasy XII is The Undying. Fusing with Venat, Vayne knows that his life is coming to an end. The Venat-powered Vayne then merges himself with the Bahamut, becoming a giant mechanical Bahamut. Taking down as many airships as possible, the party engages him, and defeats him. Soon after being defeated, the mist building up in Vayne overwhelms him, and he explodes into a cloud of mist.

Final Fantasy XII: Revenant Wings
The Final Boss of Revenant Wings is Feolthanos Exalt. Using the power of Auracite, Feolthanos becomes a giant, wielding a sceptre. He's so big the party can't even see his lower half. By attacking his chest and arms, the party are able to finally take him down once and for all.

Final Fantasy Tactics
The Final Boss of Final Fantasy Tactics is Altima. After being revived by Hashmalum, Altima immediatly begins to kill the heretics. Ramza fights back though, and eventually kills the Bloody Angel. She dies in an explosion, apparently killing Ramza and Co in the process. However, Ramza is seen later by Olan, relieving the Astronomer.

Final Fantasy Tactics Advance
The Final Boss of Final Fantasy Tactics Advance is Li-Grim. The pure form of everyone's wishes for the dream Ivalice, Li-Grim is the final thread of dream Ivalice. By defeating her, Marche can return home. Once defeated, the party must wish for the world to return to normal, taking all they've learnt in Ivalice with them.