Pokémon Diamond Version, Pearl Version, and Platinum Version - Failure
In general, an attack "fails" if it does none of its effect after it’s used, except if the attack description states that it "does nothing" as its effect. An attack also fails under the conditions specified in the respective move description.
An attack that changes stat stages without necessarily lowering or raising them, such as Psych Up and Haze, won’t fail if the change results in the same stat stages as before, unless noted otherwise.
An attack that can’t be used because it has zero PP is not considered to "fail" or be "prevented from being used".
An attack that can’t be used because it has no target is considered to "fail", but not considered to be "prevented from being used".