Related How To Remember Every Pokémon Type Weakness & Resistance Remembering every Pokémon type resistance and weakness is one of the hardest parts of playing Pokémon, and there are 18 different types of Pokémon. If a type is weak to another type, the weak type will take double the damage from the attacking type. Related Every Dual-Type Pokémon With Only One Weakness Some Pokémon type combinations are worse than either individual element, but a few combos lead to dual-type Pokémon with only one weakness.