Pokémon Gold Version, Silver Version, and Crystal Version - Stat Stages

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Stat stages refer to levels that raise or lower stats during a battle. Each stat stage has 13 different levels.

That stat scale applies to the stat stages for Attack, Defense, Special Attack, Special Defense, and Speed. At the start of a battle, each Pokémon’s stat stages begin at 0. The stat stages for a Pokémon are reset to 0 when the Pokémon leaves the battle, (except Baton Pass). Each stat stage can’t go lower than -6 or higher than 6. To apply those stat stages, multiply the stat by the stat multiplier for the corresponding stat stage, then adjust the stat so that it’s neither less than 1 nor greater than 999.

The term "stat stages" refers to those for Attack, Defense, Special Attack, Special Defense, and Speed, as well as those for Evasion and Accuracy (see the "Accuracy Check" section, below).

Stat Modification

When an effect raises or reduces a Pokémon’s Attack, Defense, Special Attack, Special Defense, or Speed stat stage; when an item is used to cure poison, burn, paralysis, freezing, or sleep; when a Pokémon gains a level (after calculating new stats); when Haze is used by either Pokémon in battle; or when Rest is used, the new values of the Attack, Defense, Special Attack, Special Defense, and Speed stats are each the original stat modified by badges, stat stages, and (in Pokémon Gold Version, Pokémon Silver Version, and Pokémon Crystal Version) paralysis and burns, but not less than 1 or greater than 999.

When an effect paralyzes or burns a Pokémon, the current Speed or Attack, respectively, is reduced to 1/4 of its previous value, rounded down, but not less than 1, and other stats remain unchanged.

When Transform is used, the opposing Pokémon’s original Attack, Defense, Special stats, and Speed, as determined in the preceding sentences, are copied and the user’s original stats become equal to those values until Transform’s effect ends, but the user’s current stats remain unchanged.

When a Pokémon enters the battle, the new values of the Attack, Defense, Special Attack, Special Defense, and Speed stats are each the original stat modified by badges, paralysis, and burns.

When a Pokémon enters the battle because of Baton Pass, instead the new values of the Attack, Defense, Special Attack, Special Defense, and Speed stats are each the original stat modified by stat stages. In Stadium 2 (called "Pokémon Stadium Gold and Silver" in Japan and "Pokémon Stadium 2" elsewhere), if that Pokémon’s stat stage would be greater than 0, its stats are also modified by paralysis and burns.