Item Fused Monsters

Rank A
Krakaphony
It's speakers emit power sonic waves known to shatter the eardrums at a high enough frequency. Angering it will cost you your hearing for a week.
*Complete Sidequest 15:Sonic Disturbance to obtain the Boomstereo.*

Count Infernetta
Given the power of the Magma Orb, it's power can destroy volcanoes and reform them into mountains. It's known to be very excitable. 
*Complete Sidequest 3: Will of the Wisp King to obtain the Magma Orb.*

Water Dragon
Known for it's calm demeanour, it's rage causes it call on tidal waves known for their destructive power.
*Complete Sidequest 6:Water upon Wrath to obtain the Water Orb.*

Taintarok
Appeared after the Ice Age, it's power is so strong that not many call upon it to help them.
*Complete Sidequest 9:Tainted Cold to obtain the Rotten Yggdrasil Fruit.*

Rank S
Yggdraksill
Empowered by the World Tree, it's powers are beyond a normal Mandrake which makes it hard to control.
*Complete Sidequest 17:World Tree Chaos to obtain the Yggdrasil Fruit.*

Mirrogear
Can manipulate the memories of those who stare into it's mirror, it tends to keep to itself.
*Complete Sidequest 23:All Is Not As It Seems to obtain the Noir Mirror.*

Insomicow
Can make people insomniac or lethargic, angering it will cause it to give nightmares to everyone who gets near it.
*Complete Sidequest 12: Daydreams and Nightmares to obtain the Dream Cheese.*

Lord Akumbra
Reborn as a loyalist to the darkness, it lives alone and has grown to resent the light in it fullest form.
*Complete Sidequest 25:Upon the Darkness to obtain the Umbra Orb.

Manicoma
Being sent into a coma caused to become corrupted as a dark beast, at it's fullest power it can kill people in their sleep.
*Complete Sidequest 26: Dying Sleep to obtain the Coma Cap.*

Oracletoise
Wise tortoise that wields the powers of earth, it knows of an ancient power lost to time itself.
*Complete Sidequest 18:Time Trouble to obtain the Oracle Scale.*

Rank X
Victorium Gatz: Burst Mode
Unleashes it's maximum power, it's Victorious Flame can sear half of the planet hence it not seeing use often.
*Complete Sidequest 31:The 3 Heroes to obtain the Burst Mode Card.*

Grand Virus: Burst Mode
Unleashes it's maximum power, it uses it's machine guns for the justice of all.
*Complete Sidequest 31:The 3 Heroes to obtain the Burst Mode Card.*

Matortress Z: Burst Mode
Unleashes it's maximum power, it's Matorfist brings the obliteration of evil's might.
*Complete Sidequest 31:The 3 Heroes to obtain the Burst Mode Card.*

Megamatrix:Critical Mode
With it's limiters now broken, it gains access to more power. It's desperation makes it a very powerful foe that can crush you easily.
*Complete Sidequest 22:Critical Meltdown to obtain the Kritikernel.*

CritiMalamore
Now unsealed without it's limiters, it uses a sword and shield setup to lay in the hits and keep itself on guard.
*Complete Sidequest 22:Critical Meltdown to obtain the Kritikernel.*

Platinum Ant
Effectively a royal, it can either be humble or arrogant depending on it's tamer. Most of it's fellow ants will obey it without question.
Complete Sidequest 9:Ant Invasion to obtain the Aqua Regis.*