The muscle band slightly power up physic type moves. Dizzywizz
It is a held item that powers up physic type moves in battle.
some Physic type moves Confusion, Physic, etc..
Dark ghost and bug type moves
Ghost is a type of pokemon. They cannot be affected by normal or physical attacks. They are weak to physic and dark type moves.
an item named dragon fang improves dragon type moves
lightining type isn't a type
No Pokemon evolves by hard stone. Hard stone just increases the power of rock type moves.
Ghost or dark type moves are super effective against Physic.
Charchol
Any item that boost the power of water type moves.
The Mystic Water is a hold item that increases the power of water-type moves.
Dark type