On the type cahrt page, at the bottom, I think it would be nice if there was logical reasoning to why a type beats a certain type. Perhaps we could have a spreadsheet or something.
Let me give an example.
Psychic is weak to Bug, Dark, and Ghost types.
Creepy crawly bugs, darkness / darkness creatures, and ghosts are all common human fears. Fear can psychologically manipulate the mind. This is further explained by the ability rattled, as being "Shook" up or rushed when faced with fear.