Loescher

I noticed it when a Grimer or Muk attacked my Geodude/Graveler with Mudbomb. I will report back with more examples, once I get the opportunity to test it.

When a Rock/Ground Pokémon, such as Geodude, gets hit by a poison attack, it hits for super effective damage. However, since both rock and ground are taking half damage from poison attacks, the combinded type should take 1/4 damage. I don't know if this is intended or not and i didn't get a chance to test this with other typings. Does anyone have more information on this?