I found this on mickeynews.com (thanks to Google!).
The 'green' elephant in the Gibson Girl Ice Cream Parlor is NOT named Penny!!
She was a fixture in the Penny Arcade in the early 90's.
She came from Disneyland Paris, and she took many failed molding/kiln attempts until she came out whole and with no flaws.
She was placed in their Penny Arcade but her name is LUCY because she appears to be made from LUCITE!!
I'll have to look for her next month during our trip ... and get some ice cream!