If you were looking for the property of a Pokémon called type in The Official Pokémon Handbook, see species.Types are properties for Pokémon and their moves. Each type has three properties: which types of Pokémon it is super effective against, which types of Pokémon it is not very effective against, and which types of Pokémon it is completely ineffective against. There are 18 types, each of which is listed to the right. During Generation I, types were occasionally referred to as elements.
A Pokémon may have either one or two types. For instance, Charmander is a Fire type, while Bulbasaur is both a Grasstype and a Poison type.All moves have only one assigned type. However, the moves Flying Press and Freeze-Dry have custom interactions with defending types that do not strictly match their assigned types.Most Gym Leaders and members of the Elite Four are designed to have a type-specific theme.If the type of a move used by a Pokémon is strong against the opponent's type, then the damage done is twice the normal amount. However, if a move's type is not very effective against the opponent's type, the damage done is half the normal amount.For Pokémon that have two types, the overall damage is calculated against both types combined. This means that if a move's type is strong against both of the opponent's types (such as Dig, a Ground-type move, used against an Aggron, a Steel/Rock Pokémon), then the move does 4 times the damage. On the other hand, if a move's type is weak against both of the opponent's types (such as Wake-Up Slap, a Fighting-type move, used against a Sigilyph, a Psychic/Flying Pokémon), then the move does ¼ of the damage. Similarly, if the move is strong against one of the opponent's types but weak against the other (such as Razor Leaf, a Grass-type move, used against a Gyarados, a Water/Flying Pokémon), the move deals normal damage.
If a move's type is completely ineffective due to one of the opponent's types, then the move does zero damage, even if the opponent has a second type that would be vulnerable to it (as in Thunderbolt, an Electric-type move, used against a Quagsire, a Water/Ground Pokémon). Otherwise, before Generation V, a move will always do at least one HP of damage. In Generation V, it became possible to deal zero damage since certain damage modifiers (such as Reflect) are applied after the damage is ensured to be at least 1
A Pokémon may have either one or two types. For instance, Charmander is a Fire type, while Bulbasaur is both a Grasstype and a Poison type.All moves have only one assigned type. However, the moves Flying Press and Freeze-Dry have custom interactions with defending types that do not strictly match their assigned types.Most Gym Leaders and members of the Elite Four are designed to have a type-specific theme.If the type of a move used by a Pokémon is strong against the opponent's type, then the damage done is twice the normal amount. However, if a move's type is not very effective against the opponent's type, the damage done is half the normal amount.For Pokémon that have two types, the overall damage is calculated against both types combined. This means that if a move's type is strong against both of the opponent's types (such as Dig, a Ground-type move, used against an Aggron, a Steel/Rock Pokémon), then the move does 4 times the damage. On the other hand, if a move's type is weak against both of the opponent's types (such as Wake-Up Slap, a Fighting-type move, used against a Sigilyph, a Psychic/Flying Pokémon), then the move does ¼ of the damage. Similarly, if the move is strong against one of the opponent's types but weak against the other (such as Razor Leaf, a Grass-type move, used against a Gyarados, a Water/Flying Pokémon), the move deals normal damage.
If a move's type is completely ineffective due to one of the opponent's types, then the move does zero damage, even if the opponent has a second type that would be vulnerable to it (as in Thunderbolt, an Electric-type move, used against a Quagsire, a Water/Ground Pokémon). Otherwise, before Generation V, a move will always do at least one HP of damage. In Generation V, it became possible to deal zero damage since certain damage modifiers (such as Reflect) are applied after the damage is ensured to be at least 1