Stats, short for statistics, determine certain aspects of battles in the games. More specifically, stats may also refer to the numerical values of each field in regards to individual Pokémon.

List of Stats

Permanent Stats

Hit Points

Hit Points, or HP for short, determine how much damage a Pokémon can receive before fainting.

Attack

The Attack stat determines how much damage a Pokémon can deal using a Physical move.

Defense

The Defense stat determines how much damage a Pokémon receives when it is hit with a Physical move.

Special

The Special stat determines how much damage a Pokémon both receives and deals in regards to Special moves. The Special stat was divided into Special Attack and Special Defense in Generation II, and the EVs and IVs were divided for Special Attack and Special Defense in Generation III.

Special Attack

The Special Attack stat determines how much damage a Pokémon can deal using a Special move.

Special Defense

The Special Defense stat determines how much damage a Pokémon receives when it is hit with a Special move.

Speed

The Speed stat determines how quickly a Pokémon can act in battle. Pokémon with higher speed will make a move before ones with lower speed.

In-battle Stats

Evasion

The Evasion stat determines how much percent chance an opponent's move will have of missing. Initial value at the start of any battle is 0%.

Accuracy

The Accuracy stat determines how much percent chance an attacker's move will have of hitting. Initial value at the start of any battle is 100%.

Stat Determination

Base Stats

The Base Stats of a Pokémon generally gives the most influence to a specific stat at a particular level. Disregarding Individual Values, Effort Values, and Nature, A level 50 Pokémon's stats will be 5 more than its Base Stats. The HP Stat will be 10 more than the Level plus the Base Stat, with the exception of Shedinja, who always has 1 HP.

For a list of Pokémon by their base stat values, see List of Pokémon by base stats.

Level

Main article: Level

When a Pokémon grows a level, its Stats will increase. For each Level gained, (ignoring Nature) Stats will increase by 1/50 the Base Stat value, and 1/100 combined Individual Value and Effort Value.

Nature

Main article: Nature

Many Natures will help one Stat of a Pokémon grow faster. However, that same Nature will slow the growth of another Stat. After the rest of the calculation, the Stat is multiplied by 1.1 for beneficial Natures, and by 0.9 for hindering Natures.

Individual Values

Main article: Individual Values

The Individual Values are what make two of the same Pokémon with equal Level and training have different Stats. This value is from 0-31. A level 100 Pokémon will have an extra point in its Stats per Individual Value.

Effort Values

Main article: Effort Values

Effort Values are what make a trained Pokémon have higher stats than a wild Pokémon at the same Level. These are gained from battling other Pokémon. A level 100 Pokémon will have an extra point in its Stats for every 4 Effort points.

Formula

HP Stat = ((IV + 2 * Base + (Effort/4)) * Level/100) + 10 + Level

Other Stats = [((IV + 2 * Base + (Effort/4)) * Level/100) + 5] * Nature

When calculating the Stats, (Effort/4) is always rounded down.

Temporary Stat modifiers

Some moves and abilities can change stats during battle, raising them and lowering them as part of the effect. Some items are made that will also do this.