Poison status

The poison condition (PSN) (Japanese: どく Poison) is a non-volatile status ailment found in the Pokémon games, it causes a Pokémon to lose HP at the end of every turn.

It can be caused by several moves most of which are Poison-type. Poison and Steel-type Pokémon are immune to being poisoned, making it the only non-volatile status ailment to be ineffective against more than one type.

Effect

A poisoned Pokémon will lose 1/8 of its maximum HP every turn in battle.

The poison status will cause a Pokémon to take double damage from Hex and Venoshock

Badly Poison

Along with the poison status, a Pokémon can also be badly poisoned; the effects are similar to poison but instead of having a set amount of damage dealt each turn, badly poisoned Pokémon will receive increasing amounts of damage each turn.

Effect

A badly poisoned Pokémon will lose 1/16 of its maximum HP on the first turn, after which damage will increase by 1/16 at the end of every turn