The PassMe2 is new CPLD code for the PassMe, created by Natrium42.
The PassMe2 works in a similar manner as the original PassMe except it uses some additional bootloadercode stored in SRAM, which was written by Loopy.
The PassMe2 is required for the IQueDS and DSs with new firmware.
A simple test to check if a PassMe2 is needed is the PictochatTest, discovered by MaHe.