User:Ztobor/Type mnemonics

A list of the mnemonics I use to memorize type effectivenesses.

But first, some notation.

• a -> b

This means that a is super effective against b. It says nothing about what the relationship is between b and a.

• a -< b

This means that a is not very effective against b. It says nothing about what the relationship is between b and a.

• a -= b

This means that a is normally effective against b. It says nothing about what the relationship is between b and a.

• a -x b

This means that a does not affect b at all. It says nothing about what the relationship is between b and a.

• a >> b

This means that a is super effective against b, and b is not very effective against a. The classic unilateral superiority, expressed in the Fire/Water/Grass type chart.

• a <> b

This means that a and b are mutually super effective (this does not currently exist, except when the types are the same).

• a == b

This means that a and b are neutral against each other. This means that the two types are completely unrelated.

• a >< b

This means that a and b are mutually defensive.

• a => b

This means that while a is super effective against b, b does not share the favour - a half-superiority.

• a =< b

This means that while a is not very effective against b, b is still normally effective against a - a half-inferiority.

Class 1: Rectangle of 2's

The following are rectangles of 2x effectivenesses, in which:

• Both types a and b are super effective against types c and d (a + b > c + d).

1. Water + Grass > Rock + Ground

×		Def
A t k		2×	2×
		2×	2×
Wa + Gs > Fr + Gd

2. Flying + Fire > Bug + Grass

×		Def
A t k		2×	2×
		2×	2×
Fr + Fl > B + Gs

3. Ground + Water > Rock + Fire

×		Def
A t k		2×	2×
		2×	2×
Gd + Wa > Rk + Fr

4. Fighting + Steel > Rock + Ice

×		Def
A t k		2×	2×
		2×	2×
Ft + St > Rk + I

5. Ghost + Dark > Ghost + Psychic

×		Def
A t k		2×	2×
		2×	2×
Gh + D > Gh + Ps

6. Fighting + Ground > Rock + Steel

×		Def
A t k		2×	2×
		2×	2×
Ft + Gd > Rk + St

Class 2: One-way triangle

The following are rectangles of 2x effectivenesses, in which:

• Type a is super-effective against both types b and c, and type b is super-effective against c. (a > b > c)

1. Bug -> Dark -> Psychic

×		Def
A t k		1×	2×	2×
		1×	½×	2×
		1×	0×	½×
B -> D -> Ps