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For example I like watching OU and gen 7 OU always 1500+ games, but for gen 7 the games are very infrequent and rare. If there was a way to add both OUs to the filter when spectating games it would be great.
I'm not an expert coder but if I can contribute anything to make this happen, such as a custom folder to view multiple format ladders at once, it would be fantastic for showdown ;)