Toxic Debris

Scatters poison spikes at the feet of the opposing team when the Pokémon takes damage from physical moves.

In game description

Scatters poison spikes at the feet of the opposing team when the Pokémon takes damage from physical moves.

Pokemon with Toxic Debris

Using Toxic Debris in Cobblemon

Abilities are passive and always active, so Toxic Debris 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.