If an opponent knocks out the user, it also faints.
Mega Froslass
Mega MalamarIf the user faints before its next move, the Pokémon that fainted it will automatically faint. End-of-turn damage is ignored. This move cannot be selected by Assist or Metronome.
If the user is knocked out after using this move, the Pokémon that knocked it out will also faint. This move's chance of failing rises if it is used in succession.