Camp or not, the show has many surprisingly popular minor characters.
- When dealing with who is the most popular villain outside of the big four (Riddler, Penguin, Joker, and Catwoman), King Tut is considered one of the best answers. Between Victor Buono's passion and hamminess with the role, having some amazing lines, and his characterization and backstory as someone genuinely insane rather than a normal criminal mastermind like most other villains, Tut is an incredibly entertaining villain. Buono having loved his role helps, as he loved it to the point where Tut was the only villain outside of the big four to appear in all three seasons.
- The Bookworm is probably the most popular one-shot Villain of the Week due to his literary-themed capers, his well-developed personality, and his costume (particularly the reading lamp attached to his hat). Reportedly the producers wanted to feature him in more episodes, but Roddy McDowall was unavailable to make further appearances.
- Shame's girlfriend and fellow special guest villain in season 3, Calamity Jan, may rival him in popularity. Fans like her chemistry with him (they're played by real-life spouses), her love for her mother, and how she's smarter than Shame and does what she can to help him in all three of the two-parter's brawls.
- Among the largely disliked cast of season 1 molls, Blaze, Lisa, Lydia, and Molly tend to be popular. All four have moments of genuine competence and relevance to the plot, and Lisa and Lydia are among the few female villains of the season to come across as hardened and unrepentant criminals rather than "Poor deluded girl[s]."
- As a whole, the season 2 cast of assorted Molls is viewed more favorably than the bunch from season 1, but Chickadee and Okie Annie are viewed particularly fondly. This is mainly because neither of them is a Neutral Female while Batman and Robin fight their male allies (Okie Annie drops a chandelier on the Dynamic Duo, while Chickadee takes Chief O'Hara hostage to make them surrender). Pussycat also has a decent number of fans and even some fan art due to her costume, her Affably Evil moments, and how she has a Dating Catwoman dynamic with Robin instead of Batman.
- The best-liked season 3 secondary female accomplices are probably Undine, Lady Prudence, and Shirley. In addition to their attractiveness, fans like Lady Prudence's subplot as The Starscream, Undine's enthusiastic participation in Joker's schemes, and Shirley's Crouching Moron, Hidden Badass moment.
- Among the various male henchmen, the main fan favorite is probably Shame's accomplice F.R.E.D., due to his wonderful Deadpan Snarker tendencies and posh accent.
- Bruce Wayne's one-shot society love interest Lisa Carson, due to keeping a fairly level head while she's a Damsel in Distress and being played by Lee Meriwether (who played Catwoman in the movie).
- Mad Artist trapmaker Ekdal from "Zelda the Great" has a big fanbase for his ingenuity and role as being Eviler than Thou to the guest villain.
- Penguin's pirate henchman Octopus, Riddler goon Whitey (for his attempt to impersonate Batman), Mr. Freeze's original henchman trio (due to his Affably Evil interactions with them), Catwoman's Big Guy, Little Guy original henchman duo Felix and Leo, Amoral Attorney Alfred Slye, and Joker goons Latch and Bolt all have good fanbases for having a bit more personality and/or fighting skills than the average henchman.
