Contrary

https://vignette.wikia.nocookie.net/pmysteryuniverse/images/a/a4/Contrary.png/revision/latest?cb=20190905043421&format=original is an is an ities|Ability]] that that reverses all of the Pokémon's stat changes.

Effect
Whenever the Pokémon's stats change, the changes are negated. Any positive stat changes become negative and vice versa.

Pokémon with

 * Shuckle
 * Spinda
 * Snivy
 * Servine
 * Serperior
 * Inkay
 * Malamar
 * Fomantis
 * Lurantis