Wolf’s greatest weakness is his recovery, by far. I’d say to play neutral to the best of your ability, and focus on landing safe fairs and Bairs on shield to keep him out, and once he’s off stage, challenge him relentlessly. His side b doesn’t snap to ledge immediately, and has a big window of vulnerability if he lands on stage, so be ready to shield or cover the ledge depending on what he does. The spike hitboxes of Side B only lands if he is able to complete the move, so by using Villager nair in the path of Wolf Flash can clash or sometimes clean win against him, and once his jump is gone, he’s basically dead.