Moody

 is a Pokémon ability introduced in the fifth generation. The ability randomly raises one stat and lowers another. It is exclusively available as a Hidden Ability.

Description
At the end of the turn, Moody raises one of the stats of the Pokémon with this ability by two stages and lowers another stat by one stat. It can affect accuracy and evasion of the Pokémon.

The ability will not attempt to lower a stat at its minimum (-6 stages) or increase a stat at its maximum (+6 stages). If all stats are already at +6 stages, Moody will only decrease a random stat.

As a Hidden Ability

 * Remoraid
 * Octillery
 * Smeargle
 * Snorunt
 * Glalie
 * Bidoof
 * Bibarel