This is the Brooklyn Nets new mascot named BrooklyKnight.
The only problem as Deadspin discovered is that it's pronounced a lot like a porn actress named Brooklyn Night.
I foresee a name change. He actually looks less like a knight and more like a Power Ranger and Storm Trooper hybrid. I'd definitely go with BrooklyTrooperRanger. Far better.
Here's how he entered the Barclay's Arena.
http://www.youtube.com/watch?&v=eONYiC0qJjY
H/T Bob's Blitz