They arrive at a greenhouse of sorts!

They continued the patrol, when Creeper asked, "Hey, what's that smell?"

Felix and Robin paused, and sniffed the air themselves. "...I don't smell anything," Felix admitted. Robin shook his head to indicate he didn't either.

"It's actually a nice, pleasant smell... the kind that makes my motor get going..." Creeper giggled, in a manner that actually made Felix shudder slightly.

Robin frowned, thoughtfully, clearly having a suspicion as to what Creeper was sniffing out. "...lead the way to it," he finally said, and Creeper grinned, and started to leap in a seemingly random direction, to one of the less developed areas of Gotham.

"...what do you think this is about?" Felix questioned Robin as they followed after Creeper.

"...Joker is not the only one who escaped Arkham tonight," Robin replied quietly. "He's just the most concerning one."

Felix nodded. "...so, you think this is another escapee, and not only that, you think you know who it is too?"

Robin nodded. "She shouldn't be too much trouble for you at least, but for now, stay on your guard. It never pays to underestimate a potential opponent," he warned Felix.

Felix nodded, gulping as he was a bit nervous. Robin made it sound like he might be facing someone who, while not on the same level of danger as the Joker, was also nothing to sneeze at. They paused as they soon arrived outside of what looked like a greenhouse, hidden among the foliage of the wooded area. "...okay, how did Creeper sniff this out from all the way over there?" Felix asked, and Robin shrugged.

"It helps that the wind carried the scent a bit, but we think that the chemicals he fell in gave him slightly enhanced senses too. As well as a slight degree of superhuman strength, agility... And what I'm pretty sure is an absurd degree of durability, given the hits I've seen him walk off, cracking jokes all the while," Robin muttered to Felix.

"...sounds like he got a much better deal from those chemicals than the Joker did," Felix noted.

"Thank all that is holy for that," Robin muttered. "...we're going in, remember, stay on your guard."