Types

Types are classifications that are assigned to Pokémon and moves. A Pokémon can have either one or two types while a move can only have one type. If a Pokémon uses a damaging move that matches one of its types, the move will gain a 1.5x damage multiplier known as STAB (same-type attack bonus).

Type effectiveness

Each type has a certain damage modifier when interacting with each of the other types, causing moves of a certain type to potentially deal double or half of the move's calculated damage, or even no damage at all. The multipliers for each combination of attacking and defending types are shown in the chart below.

Type chart

The type on the left is the attacking type while the type on top is the defending type.

	Bug	Dark	Dragon	Electric	Fighting	Fire	Flying	Ghost	Grass	Ground	Ice	Normal	Poison	Psychic	Rock	Steel	Water
	1×	2×	1×	1×	1×	½×	½×	½×	1×	2×	1×	1×	1×	½×	2×	1×	½×	1×
	1×	½×	1×	1×	1×	½×	1×	1×	2×	1×	1×	1×	1×	1×	2×	1×	½×	1×
	1×	1×	2×	1×	1×	1×	1×	1×	1×	1×	1×	1×	1×	1×	1×	1×	½×	1×
	1×	1×	½×	½×	1×	1×	1×	2×	1×	½×	0×	1×	1×	1×	1×	1×	1×	2×
	½×	2×	1×	1×	1×	1×	1×	½×	0×	1×	1×	2×	2×	½×	½×	2×	2×	1×
	2×	1×	½×	1×	1×	1×	½×	1×	1×	2×	1×	2×	1×	1×	1×	½×	2×	½×
	2×	1×	1×	½×	1×	2×	1×	1×	1×	2×	1×	1×	1×	1×	1×	½×	½×	1×
	1×	½×	1×	1×	1×	1×	1×	1×	2×	1×	1×	1×	0×	1×	2×	1×	½×	1×
	½×	1×	½×	1×	1×	1×	½×	½×	1×	½×	2×	1×	1×	½×	1×	2×	½×	2×
	½×	1×	1×	2×	1×	1×	2×	0×	1×	½×	1×	1×	1×	2×	1×	2×	2×	1×
	1×	1×	2×	1×	1×	1×	½×	2×	1×	2×	2×	½×	1×	1×	1×	1×	½×	½×
	1×	1×	1×	1×	1×	1×	1×	1×	0×	1×	1×	1×	1×	1×	1×	½×	½×	1×
	1×	1×	1×	1×	1×	1×	1×	1×	½×	2×	½×	1×	1×	½×	1×	½×	0×	1×
	1×	0×	1×	1×	1×	2×	1×	1×	1×	1×	1×	1×	1×	2×	½×	1×	½×	1×
	2×	1×	1×	1×	1×	½×	2×	2×	1×	1×	½×	2×	1×	1×	1×	1×	½×	1×
	1×	1×	1×	½×	1×	1×	½×	1×	1×	1×	1×	2×	1×	1×	1×	2×	½×	½×
	1×	1×	½×	1×	1×	1×	2×	1×	1×	½×	2×	1×	1×	1×	1×	2×	1×	½×

Type effectiveness stacks multiplicatively. For example, against a Charizard, a Fire/Flying type:

• Bug has ½× effectiveness against both Fire and Flying, so the multiplier would be reduced to ¼×.
• Steel has ½× effectiveness against Fire and 1× effectiveness against Flying, so the multiplier would remain ½x.
• Normal has 1x effectiveness against both Fire and Flying, so the multiplier would remain 1×.
• Water has 2× effectiveness against Fire and 1× effectiveness against Flying, so the multiplier would remain 2×.
• Rock has 2× effectiveness against both Fire and Flying, so the multiplier would become 4×.
• Ice has ½× effectiveness against Fire but 2× effectiveness against Flying, so the combined multiplier would be 1×.
• Ground has 2× effectiveness against Fire but 0× effectiveness against Flying, so the multiplier would become 0× and the move would deal no damage.

Type effectiveness usually has no effect on status moves. There are some exceptions to this, such as Stealth Rock and Thunder Wave.

Bugs

• Most status moves are supposed to be unaffected by immunities, but any status move that targets an opponent who is immune to the status move's type will fail.