Eldegoss

Cotton Down : When the Pokémon is hit by an attack, it scatters cotton fluff around and lowers the Speed stats of all Pokémon except itself.

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.

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.