RockDragon
Rock and Dragon types: weaknesses, resistances and Pokémon
Rock and Dragon Pokémon take double damage from Ice, Fighting, Ground, Dragon, Steel and Fairy moves and resist Fire, Normal, Electric, Poison and Flying moves.
The balance is even: 6 weaknesses and 5 resistances or immunities.
Rock moves are super effective against Fire, Ice, Flying and Bug and not very effective against Fighting, Ground and Steel. Dragon moves are super effective against Dragon and not very effective against Steel.
To beat these Pokémon, your best pick is Ice, Fighting and Ground moves. Avoid Fire, Normal, Electric and Poison moves, which deal little or no damage.
There are 2 Pokémon with this combination, such as Tyrunt and Tyrantrum.