Same-type attack bonus

The same-type attack bonus (Japanese: タイプボーナス coincident type bonus), abbreviated STAB, is a damage boost that is applied to moves used by a of the same type. This bonus has been present in all core series Pokémon games.
==In the core series games==
If a Pokémon uses a damaging move that has the same type as one of that Pokémon's types, the move's damage is increased by ×1.5. If a Pokémon has the Ability , the boost is ×2 instead.
The type of the Pokémon and the move when it is used determine whether it receives the bonus, not their listed types. For example, if a Fire-type Pokémon uses during harsh sunlight (so that the move becomes Fire-type), it will receive the bonus; however, if a pure Normal-type Pokémon uses Weather Ball during harsh sunlight, it will not receive the bonus, despite Weather Ball being listed as a Normal-type move. Similarly, if a Pokémon with activates its Protean by using an move, it will receive the bonus for Ice-type attacks and lose it for Dark-type attacks.
Pledge combination moves (two different moves from among , , or performed by the same team on the same turn) always receive the bonus, even if neither of the performers shares a type with either half of the move combination (for example, a Silvally with Grass Pledge and a Smeargle with Water Pledge).
 is a move, not a move, despite using the type effectiveness of both types. It receives STAB only when used by a Fighting-type Pokémon.
In Pokémon Legends: Arceus, STAB only increases a move's damage by ×1.25.
In Generation IX, stallized Pokémon receive STAB for their Tera type and the type(s) they had immediately before Terastallizing. If their Tera type is one of their original type(s), the STAB boost becomes ×2 for attacks that have the same type as their Tera type. If such an attack is also affected by Adaptability, the STAB boost is increased to ×2.25. 
Should the Terastallized Pokémon change to the Stellar type, the x2 STAB boost will be granted to all of its moves regardless of their type. However, the boost will only be applied once for each move type, and afterwards the boost will return to the standard x1.5 for all other moves of that same type. Within Tera Raid Battles, this limitation is absent, allowing the STAB boost to be applied at all times. 
===Unaffected moves===
The same-type attack bonus is applied as part of the damage formula, so does not apply to . Likewise, damage that is not the direct result of a damaging move (such as damage, or the additional effect of ) does not receive the same-type attack bonus.
Additionally, from Generation II onward, deals typeless damage and consequently does not receive the same-type attack bonus. From Generations II to IV, , , and also do not receive the same-type attack bonus.
Pokémon that do not have a type do not get a bonus when using a move that does not have a type. For example, if a pure Pokémon that used (and so no longer has a type) uses , Revelation Dance will not have a type and would not receive the same-type attack bonus.
Shadow moves (which only exist in Pokémon Colosseum and ) never receive the same-type attack bonus.
==In the spin-off games==
===Pokémon Mystery Dungeon series===
In the Mystery Dungeon games, STAB boosts damage by 50%.
===Pokémon GO===
In Pokémon GO, STAB boosts damage by 20% (25% prior to June 21, 2017).
===Pokémon Quest===
In Pokémon Quest, moves that have the same type as their user deal slightly more damage. This is not referred to as the "Same-type attack bonus", instead stated more generally. The heading for the loading screen tip is "Same-Type Moves", and it reads, "If you use a move that's the same type as the Pokémon using it, the move will deal slightly more damage."
==In the manga==
===Pokémon Adventures===
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The concept of same-type attack bonus was mentioned by in Salamence Evolves, noting how Zinnia used her Mega 's Ability to give its attack a power boost.
==Trivia==
* Contrary to what some early strategy guides stated, attacks receive same-type attack bonus.
* The Ability changes all of the Pokémon's moves to be Normal-type, allowing a Normal-type Pokémon to always receive the same-type attack bonus.
* The signature Abilities and can be thought to simulate STABs for and , respectively.
* In Pokémon Scarlet and Violet, there is a book entitled "Types and Moves I" at Naranja Academy/Uva Academy, which describes STAB:
"When Pokémon use a move that is the same type as they are, that move's power is increased by 50 percent. For Pokémon that have two types, moves of either type will receive this increase."
==Related articles==
* Damage
* Type
==In other languages==
Category:Game mechanics
de:Typen-Bonus
es:Movimiento#STAB
fr:STAB
it:Bonus di tipo
ja:タイプ一致ボーナス
zh:属性一致加成