FightingDark
Fighting and Dark types: weaknesses, resistances and Pokémon
Fighting and Dark Pokémon take quadruple damage from Fairy moves, take double damage from Fighting and Flying moves, resist Dark, Rock and Ghost moves and are immune to Psychic moves.
The balance is even: 3 weaknesses and 4 resistances or immunities.
Fighting moves are super effective against Normal, Ice, Rock, Dark and Steel and not very effective against Poison, Flying, Psychic, Bug and Fairy. Dark moves are super effective against Psychic and Ghost and not very effective against Fighting, Dark and Fairy.
To beat these Pokémon, your best pick is Fairy moves. Avoid Dark, Rock, Ghost and Psychic moves, which deal little or no damage.
There are 4 Pokémon with this combination, such as Scraggy, Scrafty, Pangoro and Urshifu.