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Since the inception of the Pokemon franchise, up to its modern presence through Pokemon Sword & Shield, Poison has been a tactic both used and abused. One of the most common ways to damage enemies over time, almost any pokemon can learn a move that inflicts this status condition, making it one of the most offensively versatile.

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Many players enjoying Pokemon Sword & Shield are familiar with Poison-related strategies, as moves like Toxic on defensive enemy builds can be seen frequently both in the base game and in online battles. As such, it would be useful to know the ins and outs of this status condition to better avoid it...or even to use it to one's advantage.

Poison Throughout The Generations Of The Main Series Pokemon Games

pokemon generation 1 and generation 8 poison effects

Poison In Generation 1 Pokemon Games

There are two types of Poison in the Pokemon games: regular Poison and Bad Poison. The first kind will reduce an afflicted pokemon's HP by 1/16th of its maximum value every turn (unless the poisoned pokemon knocks out an opponent, in which case the damage step of Poison gets skipped).

Bad Poison will begin by hurting the afflicted pokemon by the same amount as Poison, however, on every subsequent turn, the amount of HP lost will increase by 1/16th of that pokemon's max HP unless the badly poisoned pokemon is switched out or if the move Haze is used. If a pokemon that was badly poisoned was switched out and switches back into battle (or is hit by Haze), they will be afflicted by regular Poison instead of Bad Poison.

Outside of battle, pokemon that are poisoned will lose 1 HP every time that the player moves 4 tiles until they faint, which can cause a player to blackout if their last conscious pokemon faints this way.

Interestingly, the game's coding uses the same value for Bad Poison as it does for Leech Seed, though, both can be applied to the same target, which means that players can use moves that apply Bad Poison (Toxic) with Leech Seed to multiple the effects to essentially take down any foe in 4 to 5 turns purely with damage over time effects.

Poison In Generation 2 Pokemon Games

A pokemon afflicted by regular Poison will now lose a value of HP every turn equal to 1/8th of its max HP. Bad Poison no longer uses the same value as Leech Seed or other damage over time effects and Haze no longer changes Bad Poison to regular Poison.

As a result of a slight programming oversight, Steel-types that cannot normally be poisoned due to their natural immunity to Poison-type moves can actually be afflicted with the Poison status condition if they are subjected to the secondary effects of the Bug-type move Twineedle.

RELATED: Pokemon: The Strongest Poison-Type Move of Each Generation, Ranked

Poison In Generation 3 Pokemon Games

This generation saw many fixes to the issues plaguing the usage of this status condition in the past. Firstly, if a poisoned pokemon knocks out a foe, they will now take Poison damage. Next, Bad Poison remains Bad Poison on an afflicted pokemon even if they are switched out and back into battle, though the counter will be reset. Finally, Twineedle can no longer Poison Steel-types, much to the disappointment of Beedrill fans.

Poison In Generation 4 Pokemon Games

The only change made in this generation is that pokemon outside of battle who are poisoned will no longer faint from the residual poison damage that occurs every 4 steps. Instead, when they get down to 1 HP, they will be cured of Poison automatically.

Poison In Generation 5 Pokemon Games

Pokemon that were badly poisoned in battle become regularly poisoned after the battle ends. Furthermore, pokemon no longer take Poison damage outside of battle.

Poison In Generation 6 Pokemon Games

There were no changes made to Poison or Bad Poison between the Generation 5 and Generation 6 Pokemon games.

Poison In Generation 7 Pokemon Games

Pokemon with the ability Corrosion (exclusive to Salandit and Salazzle) can inflict Poison or Bad Poison on Steel or Poison-type pokemon.

Poison In Generation 8 Pokemon Games

In a Max Raid Battle, if a Dynamaxed or Giagantamaxed pokemon becomes badly poisoned, it will automatically become regularly poisoned immediately.

Moves That Can Cause Poison & Bad Poison In Main Series Pokemon Games

pokemon sword and shield poison fang and baneful bunker

Move Name

What Kind Of Poison It Inflicts

Probability Of Causing Poison

Description

Baneful Bunker

Poison

100%

Only inflicts Poison on foes who make contact with the user after using this move (on the same turn)

Fling

Poison or Bad Poison

100%

Will inflict Poison on foes if the user is holding the Poison Barb item or will inflict Bad Poison if the user is holding the Toxic Orb item

G-Max Malodor

Poison

100%

Exclusive G-Max move of Gigantamax Garbodor

Poison Gas

Poison

100%

A regular status move

Poison Powder

Poison

100%

Cannot affect pokemon with the ability Overcoat, those holding the Safety Goggles item, or Grass-types

Psycho Shift

Poison or Bad Poison

100%

Can only inflict Poison or Bad Poison if the user is poisoned or badly poisoned respectively

Toxic Spikes

Poison or Bad Poison

100%

If this move is used once, foes who enter battle will be poisoned, while, if used twice, foes who enter battle will be badly poisoned

Toxic Thread

Poison

100%

A regular status move

Toxic

Bad Poison

100%

Despite having 90% Accuracy, this move will never miss if used by Poison-type pokemon in Generation 4 to Generation 8 games

Poison Fang

Bad Poison

50%

From Generation 3 to Generation 5, this move had a 30% chance to inflict Bad Poison

G-Max Stun Shock

Poison

50%

Exclusive G-Max move of Gigantamax Toxtricity

Smog

Poison

40%

A damage-dealing special move

G-Max Befuddle

Poison

33.3%

Exclusive G-Max move of Gigantamax Butterfree

Gunk Shot

Poison

30%

A damage-dealing physical move

Poison Jab

Poison

30%

A damage-dealing physical move

Poison Sting

Poison

30%

A damage-dealing physical move

Secret Power

Poison

30%

Only has a chance to cause Poison if used while in tall grass (only in Generation 3 games)

Sludge

Poison

30%

A damage-dealing special move

Sludge Bomb

Poison

30%

A damage-dealing special move

Shell Side Arm

Poison

20%

A damage-dealing special move

Twineedle

Poison

20%

This move is divided into 2 separate hits, each with its own chance to inflict Poison

Cross Poison

Poison

10%

A damage-dealing physical move

Poison Tail

Poison

10%

A damage-dealing physical move

Sludge Wave

Poison

10%

A damage-dealing special move

MORE: Pokemon Sword & Shield: The Strongest Poison Pokemon, Ranked