>>41885241The vast majority of the Japanese population knows that ESP and PK are real phenomena (they also have a centuries-old fascination with ghosts), so including it in a video game was natural for the developers.
https://www.cia.gov/library/readingroom/document/cia-rdp96-00792r000400390001-1https://www.jstage.jst.go.jp/browse/jsppjPokémon was supposed to be a realistic setting, even with unrealistic elements.