Bonkers/WMG

...is set in the universe where Roger Rabbit exists, but decades later.
Roger Rabbit takes place in 1947. Bonkers clearly takes place in The Nineties. Disney is still around, so their characters exist. The companies that Maroon Cartoons parodied no longer do. The absence of the Warner Brothers characters is explained in other television series, where many are implied to be at the Warner Brothers studio in California.
 * This was almost Canon. Bonkers was meant to be a WFRR cartoon, but legal and bureaucratic red tape forced them to respin it as Bonkers. It is up to personal Fanon whether it is truly WFRR'verse or just a similar parallel verse.
 * There was a Bonkers comic in which the Toon-killing concoction is not only shown but also used by Bonkers' partner - to no effect, since he used it on a ghost. Still, that is one corrupt cop.