Foongus

Mushroom Pokémon ^#590

No one knows what the Poké Ball–like pattern on Foongus means or why Foongus has it.

The spores released from this Pokémon’s hands are highly poisonous, but when thoroughly dried, the spores can be used as stomach medicine.

- Effect-Spore
  Whenever a move makes contact with this Pokémon, the move's user has a 30% chance of being paralyzed, poisoned, or put to sleep, chosen at random. Nothing is done to compensate if the move's user is immune to one of these ailments; there is simply a lower chance that the move's user will be affected.

- Regenerator
  This Pokémon regains 1/3 of its maximum HP when it is switched out for another Pokémon under any circumstances other than having fainted. This ability does not take effect when a battle ends.

It lures Pokémon with its pattern that looks just like a Poké Ball, then releases poison spores.