BestCobblemonServers

Receiver

When an ally faints, this Pokémon gains its Ability.

In game description

The Pokémon copies the Ability of a defeated ally.

Pokemon with Receiver

#0766 Passimian Passimian

Using Receiver in Cobblemon

Abilities are passive and always active, so Receiver 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.