Sooo, I did lore for Crowe, and AU Michael Afton, so I figured our next best thing to talk about will be Exelrus! 

Exelrus started out as a cringy attempt at a .EXE character, originally called Red.EXE, but recently he's been garnering his own lore. 

Exelrus grew into a demonic entity character rather than a split, evil personality of Red, his backstory used to be that he was created by Giovanni after breaking Red's psyche, but it was stupid so, ehh.

Anyways, Exelrus is a demonic entity who took over the vessel of Red's body and used him to make the Pokemon characters of: Hop, Bede, Marnie (of Sword and Shield), and Scarlet (My OC/sona) mortal. (Also Scarlet is childhood friends with Red, and Marnie, Hop and Bede are her current friends) 

Basically making it so that they were truely alive and could bleed and die, then he hunted down each of them...Killing all four and taking their souls.

Then he escaped into the real world and began to terrorize the mortals, acting as their waking nightmare, a demonic and eldritch monster, claiming that he is their "nightmare made flesh" and that all humans are foolish and insolent. 

He resembles Red from Pokemon, with blackened eyes with white pupils, black goop drips down from them, he has animal-like claws on his hands and bat like wings coming out from his back.

He has shiny white sharp teeth that are often shown in a grin, or when he bites into his victims.

His powers involve making non mortal beings mortal, flight, prying souls from victims bodies, and shapeshifting/taking the vessels of victims. 

He finds humor in killing and eating his victims, and enjoys doing what he does to his victims, breaking their psyches and driving them insane. 

And his true form, much like Mimikyu from Sun and Moon, will cause someone to go insane. Exelrus has no need for rest, and feels no remorse or love...

Exelrus is incapable of love, but is capable of hatred and feeling pain, especially thanks to crosses, he also sometimes walks like an animal, on all fours. 

There's currently not much lore to this current iteration, but I hope y'all like him.