The request appears to refer to XJoy.exe, a utility designed to allow Nintendo Switch Joy-Cons to be used as a virtual Xbox controller on a Windows PC. What is XJoy.exe?
DuroSoft/XJoy: Use Nintendo Switch JoyCons as a ... - GitHub xjoyexe
Functionality and Features
Depending on what you are looking for, "complete piece" could refer to a few different things: 1. The Horror Character/Lore In the creepypasta community, (or Joy.exe) is a "Sonicpasta" character created by The request appears to refer to XJoy