Dimwits, or Idiots, are heroes who rarely (if ever) use their heads or have no intelligence (the former definition would be better classified as reckless). These characters are depicted as extremely dumb, obnoxious, and are very likely to ruin their own plans. However, what they lack in the brain, they're more than making up for in the heart (well, most of them). These heroes follow very few or no orders mostly because they don't seem to understand a word that is said so they do the opposite of what is said without thinking.

However, some of these dimwits can be considered not particularly dumb, as some like Mordecai and Courage the Cowardly Dog can often be considered more careless, silly and sometimes ignorant as opposed to outright dumb. It is rare for most dimwits to reach the heights of characters like Patrick Star, and Beavis & Butt-head in terms of stupidity.