Effect Spore

Description

The wielder has an 11% chance of inducing sleep upon, 10% chance of poisoning, or 9% chance of paralyzing (30% chance to activate in total) a Pokemon that connects with a contact move. Effect Spore has a separate chance of activation on each hit of a contact multi-hit move, and can status a Pokemon multiple times if the first status is removed by the effect of Lum Berry or similar items. If a Pokemon falls asleep in the midst of a multi-hit attack, it will stop attacking (unless it is holding a Lum or Chesto Berry, in which case it will wake up and continue attacking). Effect Spore is prevented by Safeguard, but not by Substitute.

Competitive Use

Effect Spore's random effects can be handy, but they can be undesirable on Pokemon that rely on selective status conditions to deal with opponents, primarily sleep. Unfortunately, that encompasses every Pokemon with Effect Spore out there. Use another ability if you can.

Found normally

Pokémon	Type	Tier	Abilities	HP	Atk	Def	SpA	SpD	Spe	BST
Amoonguss	Grass / Poison	RU	Effect Spore / Regenerator	114	85	70	85	80	30	464
Breloom	Grass / Fighting	OU	Effect Spore / Poison Heal / Technician	60	130	80	60	60	70	460
Foongus	Grass / Poison	LC	Effect Spore / Regenerator	69	55	45	55	55	15	294
Paras	Bug / Grass	LC	Effect Spore / Dry Skin / Damp	35	70	55	45	55	25	285
Parasect	Bug / Grass	NU	Effect Spore / Dry Skin / Damp	60	95	80	60	80	30	405
Shroomish	Grass	LC	Effect Spore / Poison Heal / Quick Feet	60	40	60	40	60	35	295

Found in Dream World

Pokémon	Type	Tier	Abilities	HP	Atk	Def	SpA	SpD	Spe	BST
Vileplume	Grass / Poison	NU	Chlorophyll / Effect Spore	75	80	85	100	90	50	480