Unlike the XAW units where the first few digits told you the story (e.g., XAW1000 vs XAW7000), all XKJ units are uniform. Whether your serial is XKJ70000001 or XKJ70199999, the status is the same:
The XKJ board is a Mariko revision. By definition, it does not have the Fusee Gelee vulnerability. You cannot use the "pin shorting" method. You cannot use a "SX Pro" dongle. The most popular, easiest, and cheapest method of hacking an original Switch is physically impossible on an XKJ unit. xkj switch patched
This exploit was a hardware-level bug in NVIDIA's Tegra X1 chip (the T210). It allowed attackers to send a malformed USB packet to the Switch during Recovery Mode (RCM), which overflowed the memory and allowed unsigned code to run. Crucially, this was because it was hardwired into the boot ROM. Unlike the XAW units where the first few
XKJ is now a cult term — used in forums not just to describe a patch, but a category of hidden, undocumented fixes that target modder-reverse-engineered bugs without acknowledging them publicly. You cannot use the "pin shorting" method
Technical Analysis: Nintendo Switch XKJ Series Vulnerability Status
