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This decision was completely inconsistent and biased, letting some players pass with no basis and others get moved for "being based on ladder". I have about the same tournament experience as pac in RBY OverUsed.
I sure don't recall the last OU tournament pac did well in. Hell, I don't recall the last OU tournament he entered. Is his experience not from ladder or worse, nothing at all?
I believe you placing Pinsir so low is something coming from inexperience. Pinsir is an amazing Sweeper Pokemon with its Swords Dance and Hyper Beam combo and it has Bind as well to work as a trapper and trapping moves are some of the strongest in RBY. Give Pinsir a try and he will impress!