My memory is pretty hazy but the cheat application emulated the process that teachers used to do a system reset.
Iirc, it let you press menu, select reset, confirm, and showed the (fake) confirmation screen.
Also IIRC, you had to install it from Mirage OS, which I don’t think was an OS (?) but rather an app that everyone had to play games from.
The idea is that nothing in this version matters, the whole point is to secretly approximate the shapes of the original loss comic