Additional effect

An additional effect (Japanese:  additional effect) is the in-battle secondary effect of a damaging move.

Additional effects include stat changes or status conditions with a chance of occurring. Some moves can also have more than one additional effect; is an example of this, with a 10% chance of  the target and an independent 10% chance of causing the target to.

There are three which can modify the chance to cause an additional effect. doubles their chances of occurring when the user attacks (up to 100%), removes them from the user's moves but boosts their damage, and  makes the Pokémon with that Ability immune to additional effects from moves that damage it. The rainbow created by when used in combination with  also doubles the chances of additional effects occurring (this effect does not stack with Serene Grace).

Moves that always lower the user's stat stages such as and  are not treated as moves with an additional effect. , such as the effect of, is also not considered an additional effect. The item-removing effect of, item-stealing effect of and , status condition-curing effect of  and , barrier-removing effect of  and , and the type-changing effect of  are not considered additional effects.

Additional effects caused by using while holding specific items are considered to be additional effects by Shield Dust but not by Sheer Force.

The Ability and the held items Razor Fang and King's Rock grant additional effects to moves, though (in the case of the held items) they do not interact with Sheer Force.