The core weaknesses of Ground-type in Pokemon are Water, Grass, and Ice moves. These three types deal super-effective damage to Ground-type Pokémon, so building a team or choosing moves around exploiting these weaknesses is key in battles. Keep in mind that some Ground-types have secondary typings that can modify effectiveness, so always check the target’s full type combination before planning moves. If you’d like, I can tailor a quick counters summary for common Ground-types (like Garchomp, Sandslash, or Excadrill) and which specific moves or team members to use in various generations or game versions.