Does anyone have a name for the concave-convex world platinum?

no. According to the explanation of the game of Bump World, no one named Platinum, but everyone called him Platinum, so no one named Platinum in Bump World. "Bump World" is a self-developed boutique of Qichuang Society, a national animation mobile game. It is built on the IP of "Bump World" which is deeply loved by fans, and the original unique art is exquisitely restored on the mobile platform.