|10,000,000||99,999||55,000||Nothing||All elements (Absorbs)|
|Common Drop||Rare Drop||Common Steal||Rare Steal|
|Warp Sphere||Dark Matter||Lv. 4 Key Sphere||Warp Sphere|
How To Unlock
In order to unlock Nemesis, you will need to capture 10 of every capturable fiend in the game, as well as defeat all other Creations.
Nemesis is definitely one of the most challenging bosses in the game, as it sports a whopping 10 million HP and has attacks that will most likely kill your characters every time it hits. Despite that, it has a semi-predictable pattern of attacks, so you should have a good idea of what’s coming up next. First and foremost, you will want Quick Hit on all three characters and if they aren’t hitting 99,999 against Nemesis, then you should continue grinding out the Sphere Grid until they are. In fact, you should have maxed out Strength, Defense and Magic Defense, to say the least, although having high Agility will also help. Having a high Accuracy isn’t needed, as Nemesis has low evasion.
Every character should have Auto-Haste on their armor, as well as Auto-Phoenix, with the last two slots being a bit more decisive. Auto-Protect can be good, but it would only protect from its normal attacks, as the rest are either magical in nature or will outright kill you. Mag Def +20% can be extremely useful for this fight, because of the previously mentioned abilities of Nemesis. You will also want to use Rikku for this fight, so hopefully you built her up as one of your powerful characters, since her Mix Overdrive is one of the best. Put her on Comrade, so you could potentially gain more Overdrives, as Hyper Mighty G is the one you want.
The reason for that is because Hyper Mighty G will provide Protect, Shell, Haste (not needed because of Auto-Haste), and Auto-Life. That last one is very important, since you will need it to survive Nemesis’ strongest attack. Auto-Potion is another good contender for armor, although you’d need to only stock X-Potions (they can be bribed from Valaha for 174,000 Gil to get around 60 or so). With all of that out of the way, let’s move on to Nemesis’ actual attacks. With max Defense and Auto-Protect, Nemesis’ normal attack should hit around 6,000 or so. The order of attacks on Nemesis’ end goes like this: Ethereal Cannon, Ultra Spark, then a physical attack before starting over.
Note that Nemesis can add a physical attack in between those, so you will want to keep track of things. Ethereal Cannon is a magical attack, non-elemental of course, against a single character and even with maxed Magic Defense, it should still do 10,000+ damage. If you happen to have Shell and some castings of Focus, you should be able to survive it. Ultra Spark hits the entire party (Special damage) and inflicts Poison, Curse, Slow, and Power Break. Slow can be countered with Auto-Haste and Poison can be removed with a simple Al Bhed Potion. For Power Break, you will have to use Dispel, which also gets rid of Curse, but it will remove any beneficial buffs, too (like Shell), except for Auto-Life.
You could easily summon an Aeon to take Ultra Spark, so you don’t have to deal with it, which is a lot easier than dealing with casting Auto-Life again. Nemesis has one more move up its sleeves, an ultimate attack called Armageddon. This utilizes a hidden counter and once that counter is reached, then the move will be used on Nemesis’ next turn. The counter is set at 21 and every physical attack used adds three to it, with the abilities adding two. Armageddon does a fixed 99,999 damage to the entire party, so you need Auto-Life or you will see a game over. Also, if you use any attack with Special damage, like Overdrives or items, then Nemesis will counter with Ultima.
As already mentioned, you should use nothing but Quick Hit in the battle to attack Nemesis. Overdrives will be countered with Ultima, which can be a bit annoying to deal with, especially since you might need to heal afterwards. Rikku should be a part of the battle and use the Hyper Mighty G Mix, simply for the Auto-Life. If you don’t have her Overdrive ready, then you will need to resort to manually casting Auto-Life on everyone. You shouldn’t bother with doing anything for Ethereal Cannon and just take the attack, but summoning an Aeon to tank Ultra Spark is a good idea. If you don’t have Auto-Life for Armageddon, then it’s a game over, but you can also use an Aeon to tank that. Nemesis can be a long fight, because of its high HP, but its semi-predictable pattern makes it a lot simpler.