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- In Sparks Fly for Magnemite, Grimer's anime debut, Grimer had a very strong odor that made most people around the Grimer cover their noses from the smell. However, in recent episodes, Grimer's smell has seemingly ceased to exist. This is most obvious in Camping It Up! where Dawn is given a Grimer to train, and it immediately hugs her, but no one complains about any smell.
- Grimer shares similar traits to Koffing and Trubbish. All three Pokémon are pure Poison-types with a single evolution and roughly the same base stat totals.
- Alolan Grimer and its Alolan evolution were designed by Hitoshi Ariga.