NormalGround
Normal and Ground types: weaknesses, resistances and Pokémon
Normal and Ground Pokémon take double damage from Water, Grass, Ice and Fighting moves, resist Poison and Rock moves and are immune to Electric and Ghost moves.
The balance is even: 4 weaknesses and 4 resistances or immunities.
Normal moves are super effective against no type and not very effective against Rock and Steel. Ground moves are super effective against Fire, Electric, Poison, Rock and Steel and not very effective against Grass and Bug.
To beat these Pokémon, your best pick is Water, Grass and Ice moves. Avoid Poison, Rock, Electric and Ghost moves, which deal little or no damage.
There are 2 Pokémon with this combination, such as Diggersby and Ursaluna.