vs Metaknight
Play defensively. MK has range, priority, combo-ability, speed, recovery, and edgeguarding over you. All that you have to work with is your ability to KO him easily, and chain together some semi-reliable combos between 0% and about 50%. He can gimp you VERY easily with his dair and upB, making his ability to KO you about equal with his. His B attacks are a pain, but recently, while having a few friendlies vs an MK buddy, I found that your Usmash can consistently hit through Metaknight's tornado. Side B is vulnerable to cape, You can KO him around 100% with your Usmash or Fsmash. Nair is your friend when MK's beneath you or approaching, its priority can cancel out his Uair, Fair, and Bair. His B attacks may have low start-up lag, but he's VERY vulnerable afterwards. Take advantage of these moments as MK's B attacks are an integral part of his game. Choose your method of punishment wisely, be it a grab or a spaced Fsmash, you may not be able to attack again for quite awhile. Like I said, this is a terrible matchup, and should be avoided at all costs.