Why is dark supereffective against ghost? (AGAIN) I don't get it. I get why it is supereffective against psychic, because even the greatest minds are scared of criminal activities, but why would it be good against ghost?
AND GIVE ME AN ACTUAL ANSWER THIS TIME. DON"T ANSWER IF YOU DON"T KNOW OR IF YOUR ANSWER ISN'T IN ENGLISH.

Think of it in this way: People often warn others not to speak badly of the Dead. Why? This is because, it is believed that their souls get "restless", and this causes them to haunt others. Thus, Dark type moves, that symbolise the "evil" aspect of the Pokemon, are super-effective against Ghosts. Type chart, effectiveness and weakness explained in Pokémon Go

TypeStrong AgainstWeak Against

BugGrass, Psychic, DarkFighting, Flying, Poison, Ghost, Steel, Fire, Fairy

GhostGhost, PsychicNormal, Dark

SteelRock, Ice, FairySteel, Fire, Water, Electric

FireBug, Steel, Grass, IceRock, Fire, Water, Dragon

Explanation: hopes this helps