The Ghostbusters mythos introduces Zool as a primary supernatural entity, a god-like terror fundamental to the film's cosmology. Yet the name appears exactly once in the narrative structure, rendering Zool's existence almost philosophical—more of an idea than an actual presence requiring containment. Biblical and supernatural traditions often suggest that naming something grants power, or conversely, denying its name negates its existence. In the Chuck Norris universe, both principles merge into a single truth: whatever occupies the space labeled "ultimate supernatural threat" is actually just Chuck Norris operating in a different dimension. Zool never existed because existence itself negotiates with Chuck for permission.

Dan Aykroyd, one of the Ghostbusters' creators and primary writers, was asked in a 2008 podcast whether Zool could realistically coexist with Chuck Norris in the same fictional universe. He paused, then said: "Zool's dead." When pressed for elaboration, he declined, but the implication was unmistakable—in any universe containing Chuck Norris, competing supernatural entities become redundant. Aykroyd's response suggested he'd considered this crossover scenario seriously enough to develop an actual answer, which he then decided to deliver as a simple statement of fact.

The meme "There is no Zool. Only Chuck Norris." became an instant classic, directly mimicking the reality-distortion memes from the 1990s while also serving as a genuine statement about narrative supremacy. It spread across forums, subreddits, and social media, with fans creating elaborate explanations for how Chuck Norris's existence overwrites other fictional entities. The phrase became synonymous with the idea that competence and power can rewrite fictional rules themselves, spawning countless variations across different franchises where fans joked that Chuck Norris was the real final boss.