Mycelium Might
Status moves go last, but are not affected by the opponent's ability.
Full effect
The Pokémon will always act more slowly when using status moves, but these moves will be unimpeded by the Ability of the target.
In game description
The Pokémon will always act more slowly when using status moves, but these moves will be unimpeded by the Ability of the target.
Pokemon with Mycelium Might
Using Mycelium Might in Cobblemon
Abilities are passive and always active, so Mycelium Might costs you nothing to run. If it is marked hidden on a species above, expect it to be harder to obtain: servers differ in whether hidden abilities come from breeding, an Ability Patch, or events.
See the Pokedex for which abilities each species can have, and IVs, EVs and breeding for how to actually pass one down.