When Jason and Ronnie are fused after the explosion, they're seen in ragged clothes before Batman provides them with a costume. When Firestorm is separated back to the twosome, they're back with their regular clothes intact, as well as Jason having his glasses and backpack and the Firestorm costume is missing before the guys decide to fuse together again.
Riddler: Now, Booster Gold, riddle me this: what creature is on four legs in the morning, two in the afternoon, and three in the evening?
Booster Gold: A 9-legged unicorn!
Riddler: Riddle me this: what is blue and gray and tastes like chicken?
Booster Gold: Um... hmm...
Riddler: Wrong! The correct answer is "Fried Batman."
Dr. Ecks: With this power, Double X will be unstoppable.
Angry Batman: The only Double Xs you're gonna see are the ones I'm gonna put over your eyes!
Dr. Ecks: The Batmen. You'll be the perfect test for my new power.
Slacker Batman: What? No one said anything about a test.
Slacker Batman: Nice speech, but if you're gonna keep up with this hero stuff, you'll need a name. I got it--Flame Dude.
Jason: I'll consider it.
Slacker Batman: That's all I ask.
Villains appearing without dialogue: Tiger Shark, Killer Moth, Signal Man, Eraser, Calendar Man, Zebra Man, Polka Dot Man, King Cobra, Ten-Eyed Man, Cavalier, Catman, Cluemaster, Mr. Camera, Sweet Tooth, The Spinner, Dr. No-Face, Atomic Man, Zodiac Master, The Brand, Firefly, Simon the Pieman, Mirror Man.