As this question is kind of vague, I'll answer the two I can think of this question meaning:
1. The first boss in any Final Fantasy game is Garland, who you fight at the very beginning of Final Fantasy 1.
2. The first final boss in any final fantasy is Chaos, whom you have to destroy at the very end of the first FF.
The Final boss for Final Fantasy XIII is Orphan. He has three forms that you will have to kill before beating the game.
Genissis.
Final Fantasy VI's boss theme is called Decisive Battle.
Yu Yevon.
you fight it
yes he is the final boss you have to face.
Ozma is the hardest boss in the game
Nemesis
The name of the last boss is Zeromus, an entity created out of Zemus' hate.
Final Fantasy: Unlimited .
The first Final Fantasy game came out in 1987 for the NES console.
Marilith or Kary (name depends on version)
Final Fantasy X was first released in the year 2001.
Final Fantasy 7 did not have sprites. It was the first Final Fantasy game in which the characters were rendered in 3-D.