The Halloween franchise’s unstoppable bogeyman is possessed by an inhuman evil, but why is Michael Myers so strong? Given how Michael always comes back from death, even if Halloween Ends seemingly killed him forever, there’s no definitive answer to this question since the franchise is divided across four different timelines, each of which has offered its own take on Michael Myers. Most recently, 2018’s Halloween reset the timeline, ignoring everything from Halloween II onwards and positioning itself as a direct sequel to 1978’s Halloween.

https://screenrant.com/halloween-michael-myers-human-supernatural-immortal-explained/