=12pt74 (Pronounce: "Nanashi") is an extremely powerful Formless. It lives on a plane so far away from reality, its existence can hardly be considered canon.
It usually assumes its portrayed abstract form, with the orbs orbitting around its body forming into tentacles, but its mysterious liquid body is capable of transforming into anything and anyone, mimicking the powers and attributes of the original perfectly. Considering 74's insane resilience and stamina, it isn't held back by the limits of the original, and is thus superior to the original it's mimicking. It's also capable of multiplying itself infinitely, and each body is then capable of transforming into something different.
Its shape-shifting powers are omnipotent. It does not matter if the copied original even exists. 74 is thus even capable of transforming into imaginary creatures, and wield their imaginary powers in reality, without limit. It also does not matter in what dimension a copy target lives. 74 can copy anyone and anything effortlessly.
Fortunately, 74 is a strictly neutral creature that doesn't interfere with other people' affairs. 74 only appears before mighty warriors to play with them through battling. It enjoys assuming the form of a wide array of creatures while in battle, but never uses lethal force. Fighting powerful, worthy opponents is 74's idea of fun.
74 will never appear in my story's canon, but typically appears in "bonus chapters" as a "bonus boss" to have other characters fight against old foes or even creatures from other media. For example, if you ever wanted to see Yami fight Bowser, Ridley and King Dedede back to back, now you can =P
74 being pronounced as "nanashi" is a pun. In Japanese, "nana" (七) means "seven" and "shi" (四) means "four," hence "74" being pronounced as "nanashi." Nanashi in Japanese essentially means "nameless", fitting for such an abstract concept as a Formless. Being of completely different existential planes, Formless abide my different laws than our universe does. As such, Formless do not necessarily have "identities" or physical forms (hence "Formless"). It's a concept that impossible to grasp for us since our universe just works differently to begin with.