If Hykem says it works on 5.5.1, I think he knows what he does.Um no it isn't safe. If an update doesn't patch exploits, something is very fishy. Don't come crying to me when Ninty force updates your 5.5.1 console to 6.0.0
You know, as long as I have Smash Online, I don't really care, I got my 1k hours on it, and it won't stop nowOne valid reason I guess! Just don't be here in a month or 2 asking or complaining for loadiine or homebrew