[Spenstar]

Here we go, Grave! Let's start off with a mean Glare as he tries to identify you. Since he's studying you, it should be a guaranteed hit, if not even more effective because of it! Next, as the Mudkip and clones are diving, make a Substitute. When Mudkip attacks, use Shadow Punch to hit back. Since Shadow Punch, being a guaranteed hit and of supernatural origin, will allow you to sense and strike the real Mudkip, follow your senses and make sure the Shadow Punch connects with the real thing! If at any point Mudkip suffers from parahax, use the chance to Drain his energy with a Punch!

Glare-Substitute-Shadow Punch (replace next action with Drain Punch in case of parahax)