Pokemon: Dark Overlord

[Pokemon + villain protagonist + slow burn + a touch of System + multiple heroines + slice-of-life interludes + decisive and ruthless]

Chen Zimu accidentally transmigrates to a parallel Blue Star, where he becomes the legitimate son of a powerful clan.

Through the efforts of his family and himself, he climbs step by step to the peak!

(Some of the settings in this story are original to the author. Please don't flame me if you don't like them!)