The Composite Superman. Never heard a good explanation for why he chose to look like that, cuz he did choose the look, but he basically has the powers of the Legion of SuperHeroes...
...also one of the oddest origin stories I've ever heard:
For the record:
Figured I wasn't doing anything better with my day so I decided to take a stab at him:
I'm still working out how I'm going to handle the team colors.
A couple hours later:
With Bizarro #1 I only did team colors in the boots. Given the ½ appearance of this skin, I did one boot and the gauntlet on the opposite side.