Dark
Flying and Dark types: weaknesses, resistances and Pokémon
Flying and Dark Pokémon take double damage from Electric, Ice, Rock and Fairy moves, resist Grass, Ghost and Dark moves and are immune to Ground and Psychic moves.
The balance is even: 4 weaknesses and 5 resistances or immunities.
Flying moves are super effective against Grass, Fighting and Bug and not very effective against Electric, Rock and Steel. 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 Electric, Ice and Rock moves. Avoid Grass, Ghost, Dark and Ground moves, which deal little or no damage.
There are 7 Pokémon with this combination, such as Murkrow, Honchkrow, Vullaby and Mandibuzz.