Chester Cobblepot is a lost treasure hunter in what movie?

The Goonies

Don't know if this means anything but The Penguin in "Batman Returns" is Oswald Chesterfield Cobblepot.
http://www.dccomics.com/characters/penguin

Although not used in the TV series, Penguin's real name was Oswald Chesterfield Cobblepot, first revealed in the Sunday, February 17, 1946 Batman and Robin newspaper strip, written by Alvin Schwartz.
http://www.tvtome.com/Batman/season3.html"> http://www.tvtome.com/Batman/season3.html

The Goonies--but it's Chester Copperpot

The Goonies --

(There is no Chester Cobblepot that was a lost treasure hunter)

They come across the skeletal remains of 1930s explorer Chester Copperpot and, upset that a supposed expert couldn't make it out alive, turn their quest into a hope to merely survive long enough to reach freedom. Their goal then reverts back to finding the treasure when they discover the bottom of a wishing well, which they could use to leave the caves. Instead of saving themselves, the Goonies - in a moment of clarity - decide to continue the quest for the treasure so that they can save the Goon Docks, even if it means risking their lives.

https://en.wikipedia.org/wiki/The_Goonies#Cast_and_characters