Ability · Gen 4 · 10 Pokémon
Aftermath
If this Pokemon is KOed with a contact move, that move's user loses 1/4 its max HP.
If this Pokemon is knocked out with a contact move, that move's user loses 1/4 of its maximum HP, rounded down. This effect is prevented if the move's user has the Magic Guard Ability or if any active Pokemon has the Damp Ability.
Aftermath was introduced in Generation 4. 10 Pokémon and forms can have it (6 as a hidden ability).
Best Pokémon with Aftermath
Ranked by usage in public Pokémon Showdown battles (Champions VGC first, then National Dex OU, SV OU and Champions Singles), with how many of each Pokémon's sets actually run Aftermath.
Pokémon with Aftermath
As a regular ability (4)
Drifloon
Stunky
SkuntankAs a hidden ability (6)
Voltorb
Hisuian Voltorb
TrubbishAftermath FAQ
What does Aftermath do?
If this Pokemon is knocked out with a contact move, that move's user loses 1/4 of its maximum HP, rounded down. This effect is prevented if the move's user has the Magic Guard Ability or if any active Pokemon has the Damp Ability.
Which Pokémon have Aftermath?
10 Pokémon and forms can have Aftermath, 6 of them only as a hidden ability: Voltorb, Hisuian Voltorb, Electrode, Hisuian Electrode, Drifloon, Drifblim, Stunky and Skuntank and more.
Is Aftermath a hidden ability?
It depends on the Pokémon. Voltorb, Hisuian Voltorb, Electrode, Hisuian Electrode and Trubbish have it as a hidden ability, while Drifloon, Drifblim, Stunky and Skuntank can have it as a regular ability.
What are the best Pokémon with Aftermath?
By competitive usage, the most used Pokémon that can have Aftermath are Electrode (#298 in National Dex OU, 70.7% run Aftermath), Drifblim (#377 in National Dex OU, 6.1% run Aftermath), Hisuian Electrode (#397 in National Dex OU, 50.4% run Aftermath) and Garbodor (#282 in Champions Singles).
Effect text from Pokémon Showdown (MIT); which Pokémon have it from Showdown's Pokédex, cross-checked against PokéAPI. Unofficial fan site.