Officer Grizzoli is a polar bear and an officer who works for the Zootopia Police Department.
Grizzoli was first visually identified in the game Zootopia: Crime Files as a polar bear, although writer Jared Bush has referred to him as "Grizzoli the Grizzly", suggesting he is a grizzly bear.
Further adding to the confusion, the film has Chief Bogo to call Grizzoli, Fangmeyer, and Delgato. A lion, a white wolf and a tiger are then seen getting up and leaving, but no bear.
Co-director Rich Moore has said that Delgato is a lion and Fangmeyer is a tiger (the latter of which is also supported by Zootopia: Crime Files), which would suggest Grizzoli to be the white wolf.
Role in the Film
On Judy Hopps' first day at the ZPD, Chief Bogo assigns Grizzoli to the Rainforest District to search for missing residents along with officers Delgato and Fangmeyer.
Near the end of the film, on Nick Wilde's first day as an officer, he is assigned to Tundratown SWAT, again with Delgato and Fangmeyer.