Platinum Oni is a large muscular figure resembling Gilgaros, except that he has one horn instead of two, a fluffy afro, has eyes with sky blue sclera, wears two pairs of dark metallic gray rings on his wrists and ankles, and wears a cape and loincloth that are sky blue.
As his name implies, Platinum Oni has his entire body (excluding the loincloth, cape, eyes, and the club handle) platinum colored.
How to Befriend
Obtain the Platinum Oni pass by using Platinum Dream Coins in the Crank-a-kai which can be obtained by reading QR codes.
Clear a quest in chapter 8 that will grant you the helicopter.
He can be found on the top of a building in the South Mond Area in St. Peanutsburg