Episode name reference to/pun on: The term "cat nap", where a person takes a very brief nap.
January 1, 1997
Can't Nap is the second part of the 13th episode of season one in Dexter's Laboratory that first aired on January 1, 1997. In this episode, Valhallen invites White Tiger to spend the night at Muscular Arms as thanks for stopping the supervillain Mental Mouse. However, Major Glory's cat allergy makes White Tiger feel unwelcome.
Major Glory's cat allergy does not re-appear in later Justice Friends episodes.
Krunk is allergic to dogs as shown when Heckhound appears.
Krunk and White Tiger's slapstick shenanigans when he is dressed as a rodent are a reference to MGM's Tom and Jerry.
When Major Glory gets locked out of the apartment, he yells out "Wilma!" while banging on the door, with Krunk opening it while dressed as Wilma herself, referencing the ending to The Flinstones episodes, where Fred gets locked out of his house after putting out his pet sabretooth cat.
Although this episode along with "Inflata Dee Dee" and "Monstory" aired on January 1, 1997, they were produced in 1996 according to the credits.