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I think if they don't have an issue banning evasive stuff like bright powder, and garchomp's sand veil, I can see an argument for banning iron head + serene grace.
What type of bug are you reporting? Ladder
What is the bug?
Gen 3 OU bug, I played against someone who claims they had a cloud 9 golduck but they still took damage from sandstorm. This happens to them occasionally but not always. Gen 3 ou bugged game shown here.
Are you able to...