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This includes a one-frame dashback window and a shield drop window only three units thick - both so precise that minute differences in controller calibration make all the difference. These controller issues are an artifact of Melee design choices that are not favorable for competitive play.
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This creates an arbitrary discrepancy where some players can perform techniques more reliably than others, for the sole reason that their controller is a better pick. Controllers are becoming more expensive, and few players have the luxury of testing a multitude of controllers to find one that is reliable. By now, it is fairly common knowledge that not all controllers are created equally - the disparity in quality of these controllers affects important movement techniques in Melee, most notoriously dashback and shield dropping. The availability and reliability of Gamecube controllers has been a long-standing issue in the Melee community.
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