You may not know this, but there are a number of hidden 8-Bit Mario and 8-Bit Peach drawings found in the wild within a number of different Kingdoms. These portraits are in the form of their Cat-Mario and Cat-Peach variations found back in Super Mario 3D World, and all of them hold Hearts and Coins that can be obtained by tossing Cappy at them. There is even a special 8-Bit Rosalina picture found on one of the rocks within The Dark Side.