Svenlee85
You have to be unconscious, you say you put the stealth mode, yes but in custom firmware, as soon as you are switched to official firmware you are no longer protected, nintendo has seen or sees your logs, if there has been use of become? Cdn with console certificate? The update of your games, I hope you're talking about original cartridge, otherwise it smells like a tree, and nintendo keeps an eye on you...
If you need to update your games always passed through the pc....(played offline games updated it's ok)
If not,in official firmware,without a clean nand,then the restoration of the complete nand,if you have auto rcm, you are bad,and will have to restore,nand 29go,plus boot0,boot1,then pray that it goes well ( the restoration of nand) then finally pray that when you pass in official firmware nintendo,well...that nothing abnormal is within the nintendo,otherwise.ban and superban...
And if you have not saved a clean nand, before any trace of hack, there is nothing more to do...