Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
I'm trying to RNG that Thundurus now, but I can't find the dang thing. I'm in the Route 5 / Nimbasa gate, where the bulletin board says that Route 5 has the storm, but once I step out into route 5, there's no storm. I know I used to do this with no trouble back when B/W came out... any idea what I'm supposed to do?