The holder of this item has its Attack boosted 150% of normal after it has selected a move to use. Once the user has selected a move the user cannot select another move until it has switched out and back in again, or has the item knocked away.
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Switching choice items with an opponent will remove the the locked in effect of this item until another move is selected. Item swaps can occur via use of the moves: <a href="http://pldh.net/dex/move/switcheroo" class="linksred">Switcheroo</a> and <a href="http://pldh.net/dex/move/trick" class="linksred">Trick.</a>
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If the holder is switched into battle via the move <a href="http://pldh.net/dex/move/uturn" class="linksred">U-Turn</a> and is holding this item, then the Pok&eacute;mon that was just switched in will be locked into the move U-Turn.