Monstraculus

In Sunverse, a Monstraculus is the alternate-world counterpart to the Homunculus depicted in Hiromu Arakawa's Fullmetal Alchemist.

Etymology
Homunculus is a Latin word that combines "hominis," which means "man," and "-culus," a suffix meaning "little." Because alchemy does not exist in SUMOverse, however, the origins of the beings called Homunculi in FMA have been altered, and the stones that power them consist of the souls of Pokemon, rather than humans. Because Pokemon is a shortening of "Pocket Monster," and ancient people obviously would not have been able to put Pokemon in their pockets or other small containers, it is not a reach to assume Pokemon were simply called monsters for a while. Therefore, "monstrum" took the place of hominis--a word that means "monster."

Differences from Homunculi
The Monstraculi are similar in the Homunculi in concept--beings with great power generated by thousands of souls. However, the Monstaculi are powered by False Mega Stones, rather than Philosopher's Stones. While alchemy does not exist in SUMOverse, Pokemon have incredible powers, and the Pokemon that power a False Mega Stone also determine the powers available to the Monstraculus connected to it.

While the Monstraculi are also tied to the seven deadly sins that their Homunculi counterparts are associated with, their personalities are slightly altered in relation to the type they embody. Father is similar to Arceus in how he can use the power of any type of Pokemon.