Where found: Once you have the Ragnarok, fly to the Deep Sea Research Center.  Make your way to the glowing center and answer his questions correctly to face him.  For the first question, answer with the first (and only) choice.  With the second question, take the second option and take the third option (hidden) for the final question.  Note that you will face a strong Ruby Dragon after the first two questions.  Defeat him for him to join.

Element: none

Summon: Mega Flare - Bahamut sweeps out of the clouds with flares of rage.

Abilities Statistics
Ability AP Needed Leads to Level HP Atk Power
Abilityx4 learned nothing 35 3274 1451
Magic learned nothing 40 3714 1614
GF learned nothing 50 4600 1940
Draw learned nothing 60 5494 2266
Item learned nothing 70 6396 2593
Str+60% learned nothing 80 7306 2919
Mag+60% learned nothing 90 8224 3245
Mug 200 nothing 100 9150 3571
Move-HP Up 200 nothing
Auto-Protect 250 nothing
Expendx2-1 250 nothing
Rare Item 250 nothing
SumMag+10% 40 SumMag+20%
SumMag+20% 70 SumMag+30%
SumMag+30% 140 SumMag+40%
SumMag+40% 200 nothing
GFHP+10% 40 GFHP+20%
GFHP+20% 70 GFHP+30%
GFHP+30% 140 GFHP+40%
GFHP+40% 200 nothing
Boost 10 nothing
Forbid Mag-RF learned nothing

 

Where found: Face him on the island near the desert (can be seen popping up).

Element: none

Summon: 1,000 Needles - Unstoppable barrage of needles

Abilities Statistics
Ability AP Needed Leads to Level HP Atk Power
Eva-J 200 Eva+30% 20 1766 2000
Luck-J 200 Luck+50% 30 2536 3000
Magic learned nothing 40 3314 4000
GF learned nothing 50 4100 5000
Draw learned nothing 60 4894 6000
Item learned nothing 70 5696 7000
Defend 100 nothing 80 7324 8000
Kamikaze 100 nothing 90 7324 9000
Eva+30% 150 Expendx2-1 100 8150 10000
Luck+50% 200 nothing
Initiative 160 nothing
Move-HP Up 200 nothing
HP Bonus learned nothing
Str Bonus learned nothing
Vit Bonus learned nothing
Mag Bonus learned nothing
Spr Bonus learned nothing
Auto-Potion 150 nothing
Expendx2-1 250 nothing
GFHP+10% 40 GFHP+20%
GFHP+20% 70 GFHP+30%
GFHP+30% 140 nothing

 

Where found: First off you must finish the Centra Ruins side quest and retain Odin's services.  Then run around the ruins and defeat approximately 20 Tonberries.  In the next battle you get into, defeat the Tonberry and the King will come and face you.  Defeat him to have him join.

Element: none

Summon: Chef's Knife - The King stabs a random opponent for non-elemental damage.

Abilities Statistics
Ability AP Needed Leads to Level HP Atk Power
Magic learned nothing 30 2596 1492
GF learned nothing 40 3394 1830
Draw learned nothing 50 4200 2167
Item learned nothing 60 5014 2505
LV Down learned nothing 70 5836 2842
LV Up learned nothing 80 6666 3180
Eva+30% learned nothing 90 7504 3517
Luck+50% learned nothing 100 8350 3855
Initiative 160 nothing
Move-HP Up 200 nothing
Auto-Potion 150 nothing
SumMag+10% 40 SumMag+20%
SumMag+20% 70 SumMag+30%
SumMag+30% 140 nothing
GFHP+10% 40 GFHP+20%
GFHP+20% 70 GFHP+30%
GFHP+30% 140 nothing
Boost 10 nothing
Haggle 150 Sell-High
Sell-High 150 nothing
Familiar 150 Call Shop
Call Shop 200 nothing

 

Where found: Draw from Ultima Weapon in the Deep Sea Research Center.

Element: none

Summon: Eternal Breath - long story short, lots of colors and a big explosion

Abilities Statistics
Ability AP Needed Leads to Level HP Atk Power
Spd-J learned nothing 30 4786 5425
Eva-J learned nothing 40 6314 6300
Hit-J learned nothing 50 7850 7175
Magic learned nothing 60 9334 8050
GF learned nothing 70 9999 8925
Draw learned nothing 80 9999 9600
Item learned nothing 90 9999 10675
Mad Rush 60 nothing 100 9999 11550
Darkside 100 nothing
Devour learned nothing
Luck+50% 200 nothing
Expendx3-1 250 nothing
SumMag+10% 40 SumMag+20%
SumMag+20% 70 SumMag+30%
SumMag+30% 140 SumMag+40%
SumMag+40% 200 nothing
GFHP+10% 40 GFHP+20%
GFHP+20% 70 GFHP+30%
GFHP+30% 140 GFHP+40%
GFHP+40% 200 nothing
Boost 10 nothing
GFAbl Med-RF 30 nothing