Isaac Night/Slurp

The zombie was actually Isaac Night, a brilliant and extremely intelligent scientist from Nevermore 30 years ago, also an outcast, being a Davinte, an outcast with telekinetic powers, he was a friend of Gomez Addams, his roommate in youth, Isaac tricked him into using it as disposable energy but it didn't work because Morticia cut off his hand with an Acha and caused an explosion in the tower, Gomez was about to die and as he survived he lost his electricity ability, Isaac died, Morticia and Gomez buried him, after 30 years he is revived by Pugsley Addams son of Gomez and Morticia

It was the beginning of the school year at the school for outcasts, Nevermore, Pugsley Addams was a new student at the school for outcasts, being an outcast elemental, with powers of electrokinesis.*

For a few days, Pugsley felt very lonely, his sister Wednesday's friend, Eugene, seemed to not want to be Pugsley's friend, and always pushed him away, then one day, another friend of Wednesday, Ajax, told him about the legend of the corpse of the skull tree, interested, Pugsley one night, went to the skull tree, but when tripping, Pugsley fell to the ground and accidentally activated his electronic powers, shocking something below him

But then, from under the ground, a zombie reanimated by Pugsley came out, Pugsley liked the zombie and took it to a very discreet place in Nevermore, for a while Pugsley called the zombie Pota, but one day, while everyone from Nevermore was going to a camp, Pugsley had secretly taken Pota, but the creature managed to escape from the collar and was killing people in the camp secretly