Shinryu
April 4, 2017
15:33
Are you sure you want to do this?
Level
97
HP
55500
MP
51000
Attack
175*38
Magic Attack
128 (52x)
Defense
60
Magic Defense
60
Speed
87
Evade
20%
Magic Evade
95%
Type
Heavy, Dragon
Elements
Absorbs Holy
Potential Ailments
Blind, Berserk, Mute, Slow
Steal
Dragon Fang, Dragon's Whisker (Rare)
Drops
Dragon Seal
Special Attack
N/A
AI
Condition: V00=01 {
     {Maelstrom, Fight, Roulette}
     {Ice Storm, Atomic Ray, Lightning}
     No Interrupt {
          {Maelstrom, Fight, Roulette}
          {Mighty Guard, Level 2 Old, Level 3 Flare}
     }
     No Interrupt {
          {Fight, Fight, Demon's Eye}
          {Fight, Fight, Poison Breath}
     }
}
Nothing
No Interrupt {
     Set V00=01
     Tidal Wave
}
React: Magic: No-Damage Magic {
     Set V00=00
     Zombie Breath
}
Condition: HP < 20000 & HP Damage {
     {No-Damage Magic, Nothing, Nothing}
}
First off, you absolutely want to have Coral Rings equipped or Tidal Wave will slaughter you.  On the other hand,  if you do have them equipped, hey, healing.  Unlike Omega, you don't need a specific strategy, but there's no easy one either.  Equip your best weapons (Anything that does supereffective damage to Dragons is a godsend here!).  Obviously, don't have a level that's a multiple of 2/3.  If you can survive Tidal Wave, consider Running Shoes instead; unless you have a Time Mage it's the only way you'll be even close to keeping up with his nonsense.
I really have no advice.  Get Coral Rings, use shields to block elements where possible, spam Phoenix if you have access to Summons, use the Mirage Vest image refreshing trick, WHATEVER YOU HAVE TO DO... and get ready to reset over, and over, and over - if it's even possible for your party in the first place.
Or maybe you want to do this the "easier" way.
See, Shinryuu can be berserked. The catch?  His fight command is MASSIVELY powerful, and he's fast as hell.  If you can berserk him, though, there's several things you can do:
Running Shoes/Hermes Boots: Equip them, or have Hastega.  You NEED to be able to keep up, and Coral Rings are pointless if he's not going to use Tidal Wave
Knight + allies in critical HP + !Guard = immunity
Chemists can use a mix to inflict Blind, or you can cross your fingers for any other method of Blind
Mini + Genji Shield has such a high physical evade you're near immune; you can also use things like the Defender or Elf Cape (If you can afford to give up Hermes Shoes somehow)
There's also a super slim chance of inflicting Slow
If you have Summoner, you can use Golem casts
Use the Image status via White Magic, Ninja command, or Mirage Vest refresh trick
Don't think you'll get off easy if you Berserk him.  Shinryuu already has HUGE physical damage, you don't want to see what he's like when Berserked, especially with his stupid high speed stat.  With that said, if a miracle occurs (We're talking "1.5% success rates") and you can land Blind or Slow (which don't wear off over time), it will help IMMENSELY. Chemists can inflict Blind guaranteed via a !Mix!
TL;DR Time: Use the Wonder Rod, Power Staff, or White magic Berserk to Berserk Shinryuu into only using physical attacks, then use the Mirage Vest refreshing trick, Mini + Genji Shield, constant castings of Golem, or a Knight using Cover and !Guard.