Types & Battle Math
By Omega
There are 17 types in the world of Pokemon. A Pokemon can either be one or two of these types, and the typeset for the Pokemon is determined by species. Each type has its own distinct strengths and weaknesses, both the types themselves and of the moves of that type. I shall discuss them both below.
Note: This reflects only for Generation 2 onward. In Gen 1, Bug was super-effective against Poison, Poison was super-effective against Bug (which is rather confusing), and Psychic was immune to Ghost. Additionally, Dark and Steel types did not exist.
Types
Normal
Resists: None
Is Weak to: Fighting
Has immunity to: Ghost
Fire
Resists: Fire, Grass, Bug, Ice, Steel
Is Weak to: Water, Ground, Rock
Has immunity to: None
Water
Resists: Fire, Water, Ice, Steel
Is Weak to: Grass, Electric
Has immunity to: None
Grass
Resists: Water, Grass, Ground
Is Weak to: Fire, Flying, Poison, Bug, Ice
Has immunity to: None
Electric
Resists: Electric, Flying, Steel
Is Weak to: Ground
Has immunity to: None
Ground
Resists: Rock, Poison
Is Weak to: Water, Grass, Ice
Has immunity to: Electric
Rock
Resists: Normal, Fire, Flying, Poison
Is Weak to: Water, Grass, Ground, Fighting, Steel
Has immunity to: None
Flying
Resists: Grass, Fighting, Bug
Is Weak to: Electric, Rock, Ice
Has immunity to: Ground
Fighting
Resists: Rock, Bug, Dark
Is Weak to: Flying, Psychic
Has immunity to: None
Poison
Resists: Grass, Fighting, Poison, Bug
Is Weak to: Ground, Psychic
Has immunity to: None
Psychic
Resists: Fighting, Poison, Psychic
Is Weak to: Bug, Ghost, Dark
Has immunity to: None
Bug
Resists: Grass, Ground, Fighting
Is Weak to: Fire, Rock, Flying
Has immunity to: None
Ice
Resists: Ice
Is Weak to: Fire, Rock, Fighting, Steel
Has immunity to:
Ghost
Resists: Bug
Is Weak to: Ghost, Dark
Has immunity to: Normal, Fighting
Dragon
Resists: Fire, Water, Grass, Electric
Is Weak to: Dragon, Ice
Has immunity to: None
Dark
Resists: Ghost, Dark
Is Weak to: Fighting, Bug
Has immunity to: Psychic
Steel
Resists: Normal, Grass, Rock, Flying, Psychic, Bug, Ice, Ghost, Dragon, Dark, Steel
Is Weak to: Fire, Fighting, Ground
Has immunity to: Poison
Moves
Normal
Are strong against: None
Are weak against: Rock, Steel
Have no effect on: Ghost
Fire
Are strong against: Grass, Bug, Ice, Steel
Are weak against: Fire, Water, Rock, Dragon
Have no effect on: None
Water
Are strong against: Fire, Ground, Rock
Are weak against: Water, Grass, Dragon
Have no effect on: None
Grass
Are strong against: Water, Ground, Rock
Are weak against: Fire, Grass, Flying, Poison, Bug, Dragon, Steel
Have no effect on: None
Electric
Are strong against: Water, Flying
Are weak against: Electric, Dragon
Have no effect on: Ground
Ground
Are strong against: Fire, Electric, Rock, Poison, Steel
Are weak against: Grass, Bug
Have no effect on: Flying
Rock
Are strong against: Fire, Flying, Bug, Ice
Are weak against: Ground, Fighting, Steel
Have no effect on: None
Flying
Are strong against: Grass, Fighting, Bug
Are weak against: Electric, Rock, Steel
Have no effect on: None
Fighting
Are strong against: Normal, Rock, Ice, Dark, Steel
Are weak against: Flying, Poison, Psychic, Bug
Have no effect on: Ghost
Poison
Are strong against: Grass
Are weak against: Ground, Rock, Poison, Psychic
Have no effect on: Steel
Psychic
Are strong against: Fighting, Poison
Are weak against: Psychic, Steel
Have no effect on: Dark
Bug
Are strong against: Grass, Psychic, Dark
Are weak against: Fire, Flying, Fighting, Poison, Ghost, Steel
Have no effect on: None
Ice
Are strong against: Grass, Ground, Flying, Dragon
Are weak against: Fire, Water, Ice, Steel
Have no effect on: None
Ghost
Are strong against: Psychic, Ghost
Are weak against: Dark, Steel
Have no effect on: Normal
Dragon
Are strong against: Dragon
Are weak against: Steel
Have no effect on: None
Dark
Are strong against: Psychic, Ghost
Are weak against: Fighting, Dark, Steel
Have no effect on: None
Steel
Are strong against: Rock, Ice
Are weak against: Fire, Water, Electric, Steel
Have no effect on: None
STAB
STAB stands for Same Type Attack Bonus. When a Pokemon uses a move that is the same type of one of its own types, the move's attack power is multiplied by 1.5. (The ability Adaptability, known by Eevee or by Porygon-Z by evolving a Porygon2 with Trace, multiplies same type moves by 2 instead of 1.5.)
Battle Math
Determining damage dealt by an attack is not that hard. You can figure out how much more damage it would do than normal if you follow a few simple steps:
-If STAB is applied (the move used is the same type as one of the Pokemon's types), multiply by 1.5. (If the Pokemon has Adaptability, multiply by 2 instead.)
-If the move is strong against one of the Pokemon's types, multiply by 2 for each type that is weak to the move.
-If the move is weak against one of the Pokemon's types, multiply by 0.5 for each type that is resistant to the move.
-If one of the Pokemon's types is immune to the move type, multiply by 0.
-If the Pokemon scores a critical hit, multiply by 2.
Now here are some examples to see how the damage piles up:
Magneton attacks Pelipper with Shock Wave.
Magneton is Electric/Steel type. Pelipper is Water/Flying type.
(1.5x) STAB - Shock Wave is Electric type
(2x) Electric moves are strong against the Water type.
(2x) Electric moves are strong against the Flying type.
(6x) Total.
That makes 6x against Pelipper, or 12x if Shock Wave is a critical blow. Now here's another example.
Magneton attacks Swampert with Shock Wave.
Magneton is Electric/Steel type. Swampert is Water/Ground type.
(1.5x) STAB - Shock Wave is Electric type
(2x) Electric moves are strong against the Water type.
(0x) Electric moves are nulled by the Ground type.
(0x) Total.
Just one immunity nullifies the entire attack. Now here's a few more examples.
Sceptile attacks Pelipper with Leaf Blade.
Sceptile is Grass type only. Pelipper is Water/Flying type.
(1.5x) STAB - Leaf Blade is Grass type.
(2x) Grass moves are strong against the Water type.
(0.5x) Grass moves are weak against the Flying type.
(1.5x) Total.
The 2x and 0.5x here cancel each other out. But since Pelipper isn't completely resistant to Grass, if the Sceptile doesn't have a move super-effective against Pelipper, Leaf Blade is a great offensive move.
Gallade attacks Pelipper with Leaf Blade.
Gallade is Fighting/Psychic type. Pelipper is Water/Flying type.
(1x) No STAB - Leaf Blade is Grass type; Gallade isn't.
(2x) Grass moves are strong against the Water type.
(0.5x) Grass moves are weak against the Flying type.
(1x) Total.
That's only 1x...There are better options in the arsenal. Psycho Cut for Gallade would be a better choice; at least there, STAB is applied.
Gallade attacks Swampert with Leaf Blade.
Gallade is Fighting/Psychic type. Swampert is Water/Ground type.
(1x) No STAB - Leaf Blade is Grass type; Gallade isn't.
(2x) Grass moves are strong against the Water type.
(2x) Grass moves are strong against the Ground type.
(4x) Total.
Despite not having STAB, 4x is nothing to sneeze at. Besides, Grass is the only thing you can decently assail Swampert with (sheesh, Sceptile routinely kills Swampert), so this is a must.
Porygon-Z attacks Swampert with Tri Attack.
Porygon-Z is Normal type only. Swampert is Water/Ground type.
Additionally, Porygon-Z has Adaptability.
(2x) STAB - Tri Attack is Normal type, and Porygon-Z has Adaptability.
(1x) Normal moves are average against the Water type.
(1x) Normal moves are average against the Ground type.
(2x) Total.
Tri Attack is well liked on Porygon-Z, as you can usually get at least a 2x. Against Pelipper, Thunderbolt is better, as you will get 4x.
Roserade attacks Vileplume with Grass Knot.
Roserade is Grass/Poison type. Vileplume is Grass/Poison type.
(1.5x) STAB - Grass Knot is Grass type.
(0.5x) Grass moves are weak against the Grass type.
(0.5x) Grass moves are weak against the Poison type.
(0.375x) Total.
This is a perfect example of what not to do, right next to the non-STAB variation of this, and complete immunity to types. For goodness sake, at least use Sludge Bomb or Extrasensory.
This guide is by Omega of . Only he may post this guide on sites he chooses. You may not use this guide on your site without Omega's explicit permission.
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