Reputable scene groups (like VENOM, SUXXORS, or DIGZ) ensure that the NSP is "clean" (unsigned) and that the UPD can be layered over the base game without errors. Be wary of "XCI" files that claim to include the update but are actually just the base cartridge dump.
Digital updates for the game include the latest transfers and kit changes for that specific season. NSP & Update Files
