If this Pokemon is KOed with a contact move, that move's user loses 1/4 its max HP.
Pokémon with Aftermath
Voltorb
Electrode
Drifloon
Drifblim
Stunky
Skuntank
Trubbish
GarbodorAftermath
Sun & Moon
Sun & MoonShowing Sun & Moon. Items may require trading, an event, or downloadable content.
VoltorbElectrodeDrifloonDrifblimStunkySkuntankTrubbishGarbodorSources: PokéAPI, PKHeX game records, Pokémon Showdown and Serebii.