Pokémon Types

All Pokémon creatures and their moves are assigned certain types. Each type has several strengths and weaknesses in both attack and defense. In battle, you should use Pokémon and moves that have a type advantage over your opponent; doing so will cause much more damage than normal.
 
A single-type advantage (for instance a Water attack against a Ground-type Pokémon) will net you double normal damage. The advantages also stack up, so a double-type advantage (for instance a Water attack against a Ground/Rock-type Pokémon) will net you quadruple damage. In both these cases you will see the message It's super effective! in-game after the attack.
 
Conversely, a single- and double-type disadvantage will afflict half and a quarter normal damage respectively. Here you will see the message It's not very effective... in-game.
 
Another advantage you can gain is Same Type Attack Bonus (STAB). As the name implies, this increases the power of the move if the attacking Pokémon has the same type as the move used (for example a Fire-type Pokémon using a Fire-type move). In this case the damage is 1.5 times normal. Again this is added to any other advantages, so a Water-type Pokémon using a Water-type move against a Ground/Rock-type Pokémon will bag you six times (2×2×1.5) normal damage!

Single Type Effectiveness Chart

The full type chart here displays the strengths and weaknesses of each type. Look down the left hand side for the attacking type, then move across to see how effective it is against each Pokémon type.

0	No effect (0%)
½	Not very effective (50%)
	Normal (100%)
2	Super-effective (200%)

DEFENSE → ATTACK ↓	NOR	FIR	WAT	ELE	GRA	ICE	FIG	POI	GRO	FLY	PSY	BUG	ROC	GHO	DRA	DAR	STE	FAI
Normal	Normal -> Normal = normal effectiveness	Normal -> Fire = normal effectiveness	Normal -> Water = normal effectiveness	Normal -> Electric = normal effectiveness	Normal -> Grass = normal effectiveness	Normal -> Ice = normal effectiveness	Normal -> Fighting = normal effectiveness	Normal -> Poison = normal effectiveness	Normal -> Ground = normal effectiveness	Normal -> Flying = normal effectiveness	Normal -> Psychic = normal effectiveness	Normal -> Bug = normal effectiveness	Normal -> Rock = not very effective ½	Normal -> Ghost = no effect 0	Normal -> Dragon = normal effectiveness	Normal -> Dark = normal effectiveness	Normal -> Steel = not very effective ½	Normal -> Fairy = normal effectiveness
Fire	Fire -> Normal = normal effectiveness	Fire -> Fire = not very effective ½	Fire -> Water = not very effective ½	Fire -> Electric = normal effectiveness	Fire -> Grass = super effective 2	Fire -> Ice = super effective 2	Fire -> Fighting = normal effectiveness	Fire -> Poison = normal effectiveness	Fire -> Ground = normal effectiveness	Fire -> Flying = normal effectiveness	Fire -> Psychic = normal effectiveness	Fire -> Bug = super effective 2	Fire -> Rock = not very effective ½	Fire -> Ghost = normal effectiveness	Fire -> Dragon = not very effective ½	Fire -> Dark = normal effectiveness	Fire -> Steel = super effective 2	Fire -> Fairy = normal effectiveness
Water	Water -> Normal = normal effectiveness	Water -> Fire = super effective 2	Water -> Water = not very effective ½	Water -> Electric = normal effectiveness	Water -> Grass = not very effective ½	Water -> Ice = normal effectiveness	Water -> Fighting = normal effectiveness	Water -> Poison = normal effectiveness	Water -> Ground = super effective 2	Water -> Flying = normal effectiveness	Water -> Psychic = normal effectiveness	Water -> Bug = normal effectiveness	Water -> Rock = super effective 2	Water -> Ghost = normal effectiveness	Water -> Dragon = not very effective ½	Water -> Dark = normal effectiveness	Water -> Steel = normal effectiveness	Water -> Fairy = normal effectiveness
Electric	Electric -> Normal = normal effectiveness	Electric -> Fire = normal effectiveness	Electric -> Water = super effective 2	Electric -> Electric = not very effective ½	Electric -> Grass = not very effective ½	Electric -> Ice = normal effectiveness	Electric -> Fighting = normal effectiveness	Electric -> Poison = normal effectiveness	Electric -> Ground = no effect 0	Electric -> Flying = super effective 2	Electric -> Psychic = normal effectiveness	Electric -> Bug = normal effectiveness	Electric -> Rock = normal effectiveness	Electric -> Ghost = normal effectiveness	Electric -> Dragon = not very effective ½	Electric -> Dark = normal effectiveness	Electric -> Steel = normal effectiveness	Electric -> Fairy = normal effectiveness
Grass	Grass -> Normal = normal effectiveness	Grass -> Fire = not very effective ½	Grass -> Water = super effective 2	Grass -> Electric = normal effectiveness	Grass -> Grass = not very effective ½	Grass -> Ice = normal effectiveness	Grass -> Fighting = normal effectiveness	Grass -> Poison = not very effective ½	Grass -> Ground = super effective 2	Grass -> Flying = not very effective ½	Grass -> Psychic = normal effectiveness	Grass -> Bug = not very effective ½	Grass -> Rock = super effective 2	Grass -> Ghost = normal effectiveness	Grass -> Dragon = not very effective ½	Grass -> Dark = normal effectiveness	Grass -> Steel = not very effective ½	Grass -> Fairy = normal effectiveness
Ice	Ice -> Normal = normal effectiveness	Ice -> Fire = not very effective ½	Ice -> Water = not very effective ½	Ice -> Electric = normal effectiveness	Ice -> Grass = super effective 2	Ice -> Ice = not very effective ½	Ice -> Fighting = normal effectiveness	Ice -> Poison = normal effectiveness	Ice -> Ground = super effective 2	Ice -> Flying = super effective 2	Ice -> Psychic = normal effectiveness	Ice -> Bug = normal effectiveness	Ice -> Rock = normal effectiveness	Ice -> Ghost = normal effectiveness	Ice -> Dragon = super effective 2	Ice -> Dark = normal effectiveness	Ice -> Steel = not very effective ½	Ice -> Fairy = normal effectiveness
Fighting	Fighting -> Normal = super effective 2	Fighting -> Fire = normal effectiveness	Fighting -> Water = normal effectiveness	Fighting -> Electric = normal effectiveness	Fighting -> Grass = normal effectiveness	Fighting -> Ice = super effective 2	Fighting -> Fighting = normal effectiveness	Fighting -> Poison = not very effective ½	Fighting -> Ground = normal effectiveness	Fighting -> Flying = not very effective ½	Fighting -> Psychic = not very effective ½	Fighting -> Bug = not very effective ½	Fighting -> Rock = super effective 2	Fighting -> Ghost = no effect 0	Fighting -> Dragon = normal effectiveness	Fighting -> Dark = super effective 2	Fighting -> Steel = super effective 2	Fighting -> Fairy = not very effective ½
Poison	Poison -> Normal = normal effectiveness	Poison -> Fire = normal effectiveness	Poison -> Water = normal effectiveness	Poison -> Electric = normal effectiveness	Poison -> Grass = super effective 2	Poison -> Ice = normal effectiveness	Poison -> Fighting = normal effectiveness	Poison -> Poison = not very effective ½	Poison -> Ground = not very effective ½	Poison -> Flying = normal effectiveness	Poison -> Psychic = normal effectiveness	Poison -> Bug = normal effectiveness	Poison -> Rock = not very effective ½	Poison -> Ghost = not very effective ½	Poison -> Dragon = normal effectiveness	Poison -> Dark = normal effectiveness	Poison -> Steel = no effect 0	Poison -> Fairy = super effective 2
Ground	Ground -> Normal = normal effectiveness	Ground -> Fire = super effective 2	Ground -> Water = normal effectiveness	Ground -> Electric = super effective 2	Ground -> Grass = not very effective ½	Ground -> Ice = normal effectiveness	Ground -> Fighting = normal effectiveness	Ground -> Poison = super effective 2	Ground -> Ground = normal effectiveness	Ground -> Flying = no effect 0	Ground -> Psychic = normal effectiveness	Ground -> Bug = not very effective ½	Ground -> Rock = super effective 2	Ground -> Ghost = normal effectiveness	Ground -> Dragon = normal effectiveness	Ground -> Dark = normal effectiveness	Ground -> Steel = super effective 2	Ground -> Fairy = normal effectiveness
Flying	Flying -> Normal = normal effectiveness	Flying -> Fire = normal effectiveness	Flying -> Water = normal effectiveness	Flying -> Electric = not very effective ½	Flying -> Grass = super effective 2	Flying -> Ice = normal effectiveness	Flying -> Fighting = super effective 2	Flying -> Poison = normal effectiveness	Flying -> Ground = normal effectiveness	Flying -> Flying = normal effectiveness	Flying -> Psychic = normal effectiveness	Flying -> Bug = super effective 2	Flying -> Rock = not very effective ½	Flying -> Ghost = normal effectiveness	Flying -> Dragon = normal effectiveness	Flying -> Dark = normal effectiveness	Flying -> Steel = not very effective ½	Flying -> Fairy = normal effectiveness
Psychic	Psychic -> Normal = normal effectiveness	Psychic -> Fire = normal effectiveness	Psychic -> Water = normal effectiveness	Psychic -> Electric = normal effectiveness	Psychic -> Grass = normal effectiveness	Psychic -> Ice = normal effectiveness	Psychic -> Fighting = super effective 2	Psychic -> Poison = super effective 2	Psychic -> Ground = normal effectiveness	Psychic -> Flying = normal effectiveness	Psychic -> Psychic = not very effective ½	Psychic -> Bug = normal effectiveness	Psychic -> Rock = normal effectiveness	Psychic -> Ghost = normal effectiveness	Psychic -> Dragon = normal effectiveness	Psychic -> Dark = no effect 0	Psychic -> Steel = not very effective ½	Psychic -> Fairy = normal effectiveness
Bug	Bug -> Normal = normal effectiveness	Bug -> Fire = not very effective ½	Bug -> Water = normal effectiveness	Bug -> Electric = normal effectiveness	Bug -> Grass = super effective 2	Bug -> Ice = normal effectiveness	Bug -> Fighting = not very effective ½	Bug -> Poison = not very effective ½	Bug -> Ground = normal effectiveness	Bug -> Flying = not very effective ½	Bug -> Psychic = super effective 2	Bug -> Bug = normal effectiveness	Bug -> Rock = normal effectiveness	Bug -> Ghost = not very effective ½	Bug -> Dragon = normal effectiveness	Bug -> Dark = super effective 2	Bug -> Steel = not very effective ½	Bug -> Fairy = not very effective ½
Rock	Rock -> Normal = normal effectiveness	Rock -> Fire = super effective 2	Rock -> Water = normal effectiveness	Rock -> Electric = normal effectiveness	Rock -> Grass = normal effectiveness	Rock -> Ice = super effective 2	Rock -> Fighting = not very effective ½	Rock -> Poison = normal effectiveness	Rock -> Ground = not very effective ½	Rock -> Flying = super effective 2	Rock -> Psychic = normal effectiveness	Rock -> Bug = super effective 2	Rock -> Rock = normal effectiveness	Rock -> Ghost = normal effectiveness	Rock -> Dragon = normal effectiveness	Rock -> Dark = normal effectiveness	Rock -> Steel = not very effective ½	Rock -> Fairy = normal effectiveness
Ghost	Ghost -> Normal = no effect 0	Ghost -> Fire = normal effectiveness	Ghost -> Water = normal effectiveness	Ghost -> Electric = normal effectiveness	Ghost -> Grass = normal effectiveness	Ghost -> Ice = normal effectiveness	Ghost -> Fighting = normal effectiveness	Ghost -> Poison = normal effectiveness	Ghost -> Ground = normal effectiveness	Ghost -> Flying = normal effectiveness	Ghost -> Psychic = super effective 2	Ghost -> Bug = normal effectiveness	Ghost -> Rock = normal effectiveness	Ghost -> Ghost = super effective 2	Ghost -> Dragon = normal effectiveness	Ghost -> Dark = not very effective ½	Ghost -> Steel = normal effectiveness	Ghost -> Fairy = normal effectiveness
Dragon	Dragon -> Normal = normal effectiveness	Dragon -> Fire = normal effectiveness	Dragon -> Water = normal effectiveness	Dragon -> Electric = normal effectiveness	Dragon -> Grass = normal effectiveness	Dragon -> Ice = normal effectiveness	Dragon -> Fighting = normal effectiveness	Dragon -> Poison = normal effectiveness	Dragon -> Ground = normal effectiveness	Dragon -> Flying = normal effectiveness	Dragon -> Psychic = normal effectiveness	Dragon -> Bug = normal effectiveness	Dragon -> Rock = normal effectiveness	Dragon -> Ghost = normal effectiveness	Dragon -> Dragon = super effective 2	Dragon -> Dark = normal effectiveness	Dragon -> Steel = not very effective ½	Dragon -> Fairy = no effect 0
Dark	Dark -> Normal = normal effectiveness	Dark -> Fire = normal effectiveness	Dark -> Water = normal effectiveness	Dark -> Electric = normal effectiveness	Dark -> Grass = normal effectiveness	Dark -> Ice = normal effectiveness	Dark -> Fighting = not very effective ½	Dark -> Poison = normal effectiveness	Dark -> Ground = normal effectiveness	Dark -> Flying = normal effectiveness	Dark -> Psychic = super effective 2	Dark -> Bug = normal effectiveness	Dark -> Rock = normal effectiveness	Dark -> Ghost = not very effective ½	Dark -> Dragon = normal effectiveness	Dark -> Dark = not very effective ½	Dark -> Steel = normal effectiveness	Dark -> Fairy = not very effective ½
Steel	Steel -> Normal = normal effectiveness	Steel -> Fire = not very effective ½	Steel -> Water = not very effective ½	Steel -> Electric = not very effective ½	Steel -> Grass = normal effectiveness	Steel -> Ice = super effective 2	Steel -> Fighting = normal effectiveness	Steel -> Poison = normal effectiveness	Steel -> Ground = normal effectiveness	Steel -> Flying = normal effectiveness	Steel -> Psychic = normal effectiveness	Steel -> Bug = normal effectiveness	Steel -> Rock = super effective 2	Steel -> Ghost = normal effectiveness	Steel -> Dragon = normal effectiveness	Steel -> Dark = normal effectiveness	Steel -> Steel = not very effective ½	Steel -> Fairy = super effective 2
Fairy	Fairy -> Normal = normal effectiveness	Fairy -> Fire = not very effective ½	Fairy -> Water = normal effectiveness	Fairy -> Electric = normal effectiveness	Fairy -> Grass = normal effectiveness	Fairy -> Ice = normal effectiveness	Fairy -> Fighting = super effective 2	Fairy -> Poison = not very effective ½	Fairy -> Ground = normal effectiveness	Fairy -> Flying = normal effectiveness	Fairy -> Psychic = normal effectiveness	Fairy -> Bug = normal effectiveness	Fairy -> Rock = normal effectiveness	Fairy -> Ghost = normal effectiveness	Fairy -> Dragon = super effective 2	Fairy -> Dark = super effective 2	Fairy -> Steel = not very effective ½	Fairy -> Fairy = normal effectiveness