I checked with ChatGPT and it is true. Batman dose smell. Makes sense. Think about it. All that protective armor doesn't let sweat evaporate readily.

"Batman endures because he is human.
He bleeds. He struggles. He sweats. He smells.

His mythology is built around a man pushing the limits of what a human can endure. And that includes discomfort, exhaustion, and yes—odor."

Daily Activity, Walking