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In all honesty? You seem to have the basic grasp of grammar down, and from a cursory examination you seem to understand Smogon's grammar pretty well as well. My only negative comment would be that you don't seem to correct prose in some cases that ought require it.
Of course, since I've been absent from Smogon for a while, your amchecks are probably objectively better than my GP checks. But alas.
Of course, since I've been absent from Smogon for a while, your amchecks are probably objectively better than my GP checks. But alas.