Toxic

Badly poisons the target, dealing more damage every turn.

Toxic causes the target to be badly poisoned . Pokémon that are badly poisoned will lose an increasing amount of HP at the end of each turn.
The affected Pokémon will lose 6,25% (¹⁄₁₆) of its maximum HP at the end of the turn increasing by by 6,25% each turn.
The table below shows the amount lost per turn:

Turn	Amount	Total Lost
1	6,25%	6,25%
2	12,5%	18,75%
3	18,75%	37,5%
4	25%	62,5%
5	31,25%	93,75%
6	37,5%	131,25%

Toxic doesn't work if:

• the target is already carrying a major status ailment
• the target is behind a Substitute
• the target is a Poison or Steel -type Pokémon
• the target has the ability Immunity

If used by a Poison -type Pokémon, Toxic will always hit, even if the target is in the semi-invulnerable stage of Bounce, Dig, Dive, Fly, Phantom Force, Shadow Force or Sky Drop.

• In Gen 1 Toxic also increase the damage taken by Leech Seed due to a bug.
  The badly poisened effect will become regular poison outside of battle.
• In Gen 1-4 Toxic has 85% accuracy
• Dynamax Pokémon in Max Raid Battles and Tera Pokémon in Tera Raid Battles will receive regular poison instead.