>>47480693All psychic-type weaknesses represent common phobias; to bugs, ghosts, and the dark, or otherwise the petty thuggery dark types represent.
I always think of dark types being weak to bug types as a joke on how tough guy facades are broken if people catch them being scared by bugs.
Ghost types needed another weakness once Gen 1's broken, low-quality type chart was reworked, and Dark types were the most fitting. After all, what is a ghost gonna do to a flippant criminal? Spook them? Go get your grave pissed on, idiot ghosts.
>>47480670Ground is the "loose particles" type and Rock/Steel are distinct enough to justify.