Inert objects are usually defined by being dark and gray-looking, with sharp edges. These objects are either from painted objects that have had their Paint sucked out by the Blot. Most inert objects can be painted over for appearance and convenience.
Inert objects are also how Beetleworx are formed, created from real robotic parts, and painted over. Mickey must use Thinner to get through the painted parts to the weak inert center. In the ending, after the Shadow Blot is defeated, all inert things regain paint and the Cartoon Wasteland is restored.
- Inert was originally metallic but was changed to stone because it wasn't instantly readable.