Poison-type Pokémon are weak to Ground- and Psychic-type moves.

Quick Scoop

  • Poison takes 2× damage from Ground-type attacks like Earthquake.
  • It also takes 2× damage from Psychic-type attacks like Psychic.

Extra Handy Info

  • Poison resists Fighting, Poison, Bug, Grass, and Fairy moves, meaning those do reduced damage.
  • Poison-type attacks are super effective against Grass and Fairy Pokémon, so use them when you see those types on the field.

In simple terms: if you’re trying to beat a Poison-type, Ground or Psychic is usually your best bet.

TL;DR: What is poison weak to Pokémon-wise? Ground and Psychic moves hit Poison-types super effectively.

Information gathered from public forums or data available on the internet and portrayed here.