In Pokemon certain types can beat others and here are my examples: Water beats Fire, Fire beats Grass, Grass beats Water, Dark beats Ghost, Water beats Electric, Water beats Ground, Water beats Rock, Grass beats Rock, Grass beats Ground, Fighting beats Grass, Flying beats Grass, Physic can beat Grass, Ground beats Fire, Fire beats Steel, Fighting beats Dark, Bug beats Dark
Fighting and Fairy
a powerful or even weak Pokemon with shadow ball, the type is dark
Normal doesn't beat anything Fire beats Grass, Ice, Bug and Steel. Water beats Fire, Ground and Rock Grass beats Water, Ground, and Rock. Electric beats Water and Flying. Ice beats Ground, Flying, Dragon and grass Fighting beats Normal and dark Poison beats grass Ground beats Fire, Electric and Rock. Flying beats Grass, Fighting and Bug. Psychic beats Fighting. Bug beats Grass, dark and psychic Rock beats Fire, ice and Flying. Ghost beats ghost and psychic Dragon beats Dragon. Dark beats Ghost and Psychic. Steel beats Rock. Hope this helps!
Bug, Ghost, and Dark type are super-effective (2x) against Psychic type Pokemon (assuming it is pure Psychic, such as a Mew)
Fighting and Fairy
Fighting/Bug
Fighting type and Bug type beats Dark type
In Pokemon certain types can beat others and here are my examples: Water beats Fire, Fire beats Grass, Grass beats Water, Dark beats Ghost, Water beats Electric, Water beats Ground, Water beats Rock, Grass beats Rock, Grass beats Ground, Fighting beats Grass, Flying beats Grass, Physic can beat Grass, Ground beats Fire, Fire beats Steel, Fighting beats Dark, Bug beats Dark
Dark and Ghost
assuming you mean psychic pokemon, dark type is supereffective
Fighting and Fairy
They are weak against Ghost and Dark.
a powerful or even weak Pokemon with shadow ball, the type is dark
Dark, Bug, and Ghost type attacks.
Another dark type Pokemon for example gengar will be hurt super effectively buy the move bit wich is dark (or ghost not positive)
Dark types beat ghost Pokemon, as do those of a higher level with the fire type.