Revenge of the Fallen (L Zeto)

This is undoubtedly the hardest fight in the entire game. In order to get here, you must have done.... well basically everything.

Basically, you must have:

Beat the game (Main storyline....)
Have Melody and Nayu
Complete all 8 arcs
Complete Secret Chapter (Well except for this fight, of course....)

Now for what you should have:

um... like 14 RB's
At least 25 Tuna Soups
At least 10 Fried Furious Fish
ALL Arc Tier Skills
ALL TRANSFORMATION SKILLS (If you don't have this, get out....)
ALL STATS AT 999
9999 HP for whole party
AT LEAST 5000 MP (preferably over 7500 at least, so you will never need to use MP pots)
THE DISPEL SKILL (I would recommend using it 20 times to get LIBERATION.)
Crystal Skills for Zeru and Lenna (The first map of the secret chapter has a crystal at the very start with skills)

and... well the rest of what you should normally have... tons of pots and stuff....

Okay, so you've just defeated Zeto's team. You had the opportunity to change your party (even though you probably didn't). You've saved. Talk to Zeto. He is the only one left.... right?

(BTW, IT WOULD BE USEFUL TO BE TRANSFORMED AT THE START)

Light TRANSFORMATION!!!!!!

FINAL BOSS BATTLE OF FSII: Zeto's Full Team

Alright, here we go. Immediately at the start...

SOUL IMPACT
RADIANT SLASH
SEVEN SLASHES OF THE LIGHT DRAGON
SOUL RESURRECTION

By the way, I am assuming you are using FSI cast.

Okay, revive the one killed by seven slashes, then Tuna Soup your party. On the first turn cast Immunize with Serene. Then Radiant Flare Ethan with Zeru.

So you remember him using Soul Resurrection, right? That guy will use it every three turns until everyone is back, in this order:

Ethan
Luna
Evelyn
Ellis
Silvie
Aria
Klaire

Alright, so kill them in the order they spawn. (And when I say attack, I mean use transformation skills. If you are untransformed, use Fried Furious Fish to get your SR up FAST.)

First, Zeto notes: Okay, not much. He only has one other move besides those four, which is Uroboros Guard. Whenever he uses this, immediately have Serene use Liberation and carry on.

Anyways, during the three turns with only Ethan and Zeto, use Antlan as your healer and have the other three attack Ethan (For Serene, just use Ground Blow. If you keep doing this, Zeto will eventually die too).

When Luna Spawns, switch Royke to attacking Luna, and keep attacking Ethan with Zeru. Serene still uses Ground Blow, and Antlan is still your healer for now.

Evelyn:
By now, Ethan should be long gone. After Ethan is gone, Zeru becomes your healer. Antlan should attack Evelyn. Serene should continue using ground blow. Royke should keep attacking Luna. When Luna dies, Zeru can start attacking Evelyn and Royke becomes your healer.

Ellis:
Hopefully Luna is dead by now.... But anyways, completely ignore Ellis until Evelyn is dead too. Once Evelyn dies, I would have Zeru and Antlan attack Ellis, Royke still acting as a healer. Serene should buff your party at this time I guess.... Or she could single-target Zeto with Terra Strike if he's still alive if you want.

Silvie: Ignore Silvie until Ellis is dead. By now, you might be falling behind a bit, and there may be 3 or 4 guys alive. Don't panic. Silvie isn't a big thing. Remember how I told you to buff yourself with Serene? If you've done that, Silvie will be nearly a complete joke, with the exception of Volt Shot, which may hit around 3k. Anyways, after Ellis goes down you can start attacking Silvie with anybody except for Royke, who is still your healer. However, pay attention carefully to what I say when Aria spawns.

Aria: Alright, now this girl can potentially cause a lot of trouble and screw up all your efforts for this fight. She has Soul Liberation, which is exactly like Ethan's Soul Debuff. The good thing is that she doesn't have Calm Wind, but it is replaced with Party Soul Healing III, which heals about 30-40k to the whole party. The second she spawns you should begin focusing all your attacks on her. Zeru, Antlan, and Royke should go and crush her while Serene heals and buffs. The one good thing about Aria is that her damage isn't a big factor.

Klaire: Like I said, ignore everything until Aria is dead. Once you manage to finish her off, begin targeting Klaire, even if Silvie is still alive. Klaire has good damage with his Soul Reap and Demon Soul Breath. Also, he has Soul Curse, so make sure you have Immunize up. You can go all out on Klaire, with every one of your party members annhialating him, just have one of them use a Tuna Soup when needed.

Once Klaire dies, you can do the following in this order of priority:

1. Kill Zeto (If still alive)
2. Kill Silvie (If still alive)
3. Jump up and down and start cheering, because you have beaten Zeto's Full Team!

And that's it! Congragulations on beating Light Zeto!