Other villains who appear with no dialogue: Bane, Black Mask (and his Number One), Cosmo Krank, Cluemaster, Firefly, Gearhead, Punch and Judy, Man-Bat, Maxie Zeus, Mr. Freeze, Penguin (with the Kabuki Twins), Poison Ivy, Ragdoll, Riddler, Rupert Thorne, Spellbinder, Temblor, and The Ventriloquist & Scarface.

Catwoman: Now, handsome, how did you know to find me here? I thought I was being careful.
Robin: Nothing screams careful like a brick through the window.

Rumor: (to the captured villains) I have bad news and I have worse news. The bad news is that I've sentenced you all to life. The worse news is it's going to be a very short sentence.