A motion to strike asks the court to ban a pleading, like an Answer, from being used. A motion to strike is filed to contest or question the legal sufficiency of any one or more of the allegations or causes of action.Dispositive motions include motions to dismiss and motions for summary judgment. To oppose a motion, you must prepare an affidavit or affirmation. Welcome to Washington State Courts. We can provide you with samples of court forms that are available. We can provide you with guidance on how to fill out forms. Petition under original Supreme Court or Court of Appeals jurisdiction. Every pleading, plea, motion, or application to the court for an order, whether in the form of a motion, plea, or other form of request, unless presented. However, a party will not be deemed in default if he has served an appearance in the form of a motion to dismiss.