Are there team fight? And can a character bring along a “helper” to bring his special weapon?
I don’t see why not, as long it’s a registered fighter. But during registration, your fighter have to pass the inspection phase, which basically checks the graphical representation of your character, gear, stats, for any signs of illegal tweaking/forgery, etc. As long as a fighter successfully passes through all this, he gets to join tournies, form teams, etc. I imagine the registration process is all automated, simply submitting your Fighter and getting a Serial Number in return.