While there is no single official "Pixel King XML" file from a primary developer, this term typically refers to a designed to give Android devices the specific photo processing style of a Google Pixel phone.
The "Pixel King" XML file is a popular configuration profile used for the Google Camera (GCam) pixel king xml file download link
Search for the asset name alongside "generic XML." Many sprite sheets follow standard layouts. If "Pixel King" was part of a pack, look for the XML files of the other characters in that pack. Copy the structure, change the coordinates, and you have a working file. GCam (Google Camera) configuration file While there is
Potential steps could be: