Poison

Deals damage equal to ⅛ of the Pokémon's maximum HP at the end of each turn.

Poison (PSN) deals damage equal to ⅛ of the Pokémon's maximum HP at the end of each turn.
There is also a stronger version of this status condition called bad poison where the damage increases by the original amount each turn.
Most moves that apply poison are Poison -type.
Poison and Steel -type Pokémon are immune to poison except when caused by Pokémon with the Corrosion ability.

Effects that interact with the Burn status condition:

Pokémon with the ability Immunity, Comatose or Purifying Salt are completely immune to poison.
Minior in its Meteor Form can not be poisoned.
Pokémon with the ability Pastel Veil will prevent itself and its allies from being poisoned.
Pokémon with the ability Leaf Guard only prevents poison during harsh sunlight
Pokémon with the ability Magic Guard are immune to the damage but does not prevent it outside of combat.
Pokémon with the ability Poison Point have a 30% chance to poison enemies that make contact with them.
Pokémon with the ability Poison Touch have a 30% chance to poison enemies that they make contact with.
Pokémon with the ability Effect Spore have a 9% chance to poison enemies that they make contact with.
If the target has the ability Synchronize, the user will also be poisoned or badly poisoned.
Pokémon with the ability Natural Cure are cured after switching out.
Pokémon with the ability Hydration are cured during rain
Pokémon with the ability Shed Skin have a 30% chance to be cured at the end of each turn.
Pokémon with the ability Healer have a 30% chance to cure their allies.
Pokémon with the ability Toxic Boost have their Attack raised by 50% when poisoned.
Psycho Shift will transfer the poison to its target.
Safeguard and Misty Terrain protect the user's party from being poisoned.
A Pokémon holding a Toxic Orb will badly poison itself at the end of each turn.
Pokémon behind a Substitute can only receive poison through Synchronize or a held Toxic Orb.

Pokémon with the abilities Guts, Marvel Scale, Quick Feet and Flare Boost can receive benefits by being poisoned.

Other Effects

Poisoned Pokémon release bubbles from the main image every few seconds.

Changes

• In Gen 1 poison deals damage equal to ¹⁄₁₆ of the Pokémon's maximum HP at the end of each turn.
  There is a bug with the bad poison version of this status condition where its damage increasing multiplier is further increased by Leech Seed.
  Using Haze cures the target's poison.
• In Gen 1-3 poisoned Pokémon take damage outside of combat until they feint.
• In Gen 1-4 poisoned Pokémon also take damage outside of combat (1 HP every 4 steps / 5 steps in FireRedLeafGreen)
  A Pokémon can not be badly poisoned when receiving a poison caused by Synchronize.
• In Gen 2 Steel -type Pokémon can be poisoned by Twineedle.
• In Gen 4 poisoned Pokémon are cured when they reach 1 HP outside of combat.
• In Gen 5 poisoned Pokémon have a purple glow instead of releasing bubbles.
• In the japanese version of BlackWhite Poison Touch has only a 20% chance to poison an enemy.