Darkwing Duck
Though originally thought by some fans to be a spin-off of the 1987 "DuckTales" series, creator Tad Stones stated in a 2016 report that he believes the two shows exist in different universes. Despite this, supporting characters Launchpad McQuack and Gizmoduck appear in both series in similar roles, and Scrooge McDuck is mentioned in the "Darkwing Duck" episode "Tiff of the Titans". Additionally, the 2011 comic book series "DuckTales" makes reference to Darkwing Duck and features various villains from the series. A crossover between the "Darkwing Duck" and "DuckTales" comics occurs in issues 17–18 and issues 5–6, respectively, of each.