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