Oswald Cobblepot (Earth-Prime)

""A run for his money". The Penguin owns Iceberg Lounge, which has a backroom casino."

- Ryan Wilder to Sophie Moore

The Penguin is the owner of Iceberg Lounge and a former enemy of Batman.

Biography
At some point, the Penguin became the owner of the Iceberg Lounge and an enemy of Batman.

He was mentioned in 2021 during a trivia game by the Cluemaster alongside Captain Cold and Mr. Freeze.

Trivia

 * An umbrella is among the various items that Batman has collected over his career. This presumably belonged to the Penguin, although this remains unconfirmed.