Omega
April 4, 2017
15:33
Honestly, you thought Shinryuu was bad? You ain't seen nothin' yet.
Level
119 (yes seriously)
HP
55530
MP
60700
Attack
115*25
Magic Attack
199 (96x)
Defense
190
Magic Defense
150
Speed
76
Evade
95%
Magic Evade
90%
Type
Heavy
Elements
Absorbs all except thunder; weak to thunder
Potential Ailments
Stop, Slow
Steal
Nothing
Drops
Omega Badge
Special Attack
N/A
Initial Status
Reflect (Permanent), Shell, Stop
AI
{Atomic Ray, Delta Attack, Blaster}
Surge Beam
{Rainbow Wind, Flamethrower, Atomic Ray}
Surge Beam
No Interrupt {
     {Delta Attack, Blaster, Surge Beam}
     {Maelstrom, Earthquake, Rainbow Wind}
}
Targeting
{Rainbow Wind, Flamethrower, Atomic Ray}
Wave Cannon
React: HP Damage {
     No Interrupt {
          {Rocket Punch, Rocket Punch, Mustard Bomb}
          {Rocket Punch, Rocket Punch, Circle}
     }
}
Atomic Ray
Fire damage to the party
Blaster
Instant Death spell
Circle
Removes a character if it succeeds (Can't be revived)
Delta Attack
Petrification
Maelstrom
Party HP to Critical
Mustard Bomb
Magic damage & HP Leak
Quake
Earth damage to party
Rainbow Wind
Dark, Mute, HP Leak
Rocket Punch
Damage & Charm
Surge Beam
Damage equal to half of MAX HP to party
  ...So how the fuck do you beat this guy?  Here's classes that will make a huge difference:
Bard
Love Song can Stop it; for whatever reason, it ignores the Magic Accuracy thing.  The Stop effect wears off quickly, however, but two Hasted !Sing users can almost keep him stoplocked
Beastmaster
Tame can Stop it (Or should be able to at least in GBA version), !Release a Yellow Dragon that performs Lightning for a free 9999 damage at the start
Berserk
TECHNICALLY Berserker can deal damage because axes treat Omega as only having like 42-ish DEF but do you really want to proc an infinite array of counterattacks that can confuse I mean really
Black Mage
Bounce Thundaga or Flare spells off of yourself
Blue Mage
Mighty Guard turns the damage from immense to "not completely bullshit"
Chemist
A number of useful buffs, including Dragon Kiss (Heavy targets are immune to Blaster, Circle, HP Critical, etc); damage via Shadow Flare/Lillith's Kiss
Magic Knight
Thundaga Sword will deal 9999 damage a hit since it ignores defense
Monk
If you crit (8%) then you ignore defense; if it fails, 0 damage and get countered.
Samurai
If your sword crits, it ignores Defense.  If it fails, 0 damage and get countered.
Summoner
Summon spells don't reflect, although careful which you use
Time Mage
Hastega, Meteor doesn't get reflected.  Landing Slow could be a godsend but good luck with that
White Mage
Heal pls
The IDEAL way to deal the most damage to Omega is Magic Knight with Ranger's !X-Fight and/or Ninja's dual-wielding, as that will shave off about 20k HP (or 40k if you have both) a turn.  Everyone else is looking at a lot longer, messier battle, and the reality is that several classes are just going to be USELESS in this battle.
Flame Rings will absorb Atomic Ray for some healing, or for a class that can, equip Flame Shield + Wall Ring to negate most of his attacks; add Float too if you can.  Haste Shoes will let you get more turns (and you will desperately need them).  Keep in mind that Wall Ring will reflect Atomic Rays, which do heal Omega.
There is also some oddity about his "Targeting" ability - when he uses it, he performs all actions until his next turn against the target, this INCLUDES his counterattacks.  This ability can be reflected so his actions will target himself, dealing damage to himself and sparing your party some pain.  This INCLUDES his counterattacks for that duration, giving you an opportunity to nail him!
Seriously, there's several parties that likely just won't be able to complete this, because there are only a very small number of ways to even DAMAGE this fucker, and that's all there is to it.