The target is blown away, and a different Pokémon is dragged out. Both Pokémon are made sick. In the wild, this ends a battle against a single Pokémon.
Move Description
The user blows the opponent away with a blast of germy, contaminated air that sickens it. The opponent also spreads its sickness to the Pokémon taking its place.
Effect
Poisons the target, then switches the target out for another of its trainer's Pokémon, selected at random. The replacement Pokémon is then also immediately poisoned by this move. If the target is a single wild Pokémon whose level is equal to or lower than the user's level, the battle ends instead. This move cannot end a wild battle if there are multiple conscious Pokémon on the target's side of the field.
If the target is under the effect of Ingrain or Suction Cups, it has a Substitute, its Trainer has no more usable Pokémon, or either the user or the target faints immediately after this attack, the target will not be switched out/the battle will not end.