M2K loves N-airs. He has some nasty variation combos when you are on the stage and will try to force you to use your jumps once he gets you offstage (not hard for him to do.)
Up-air has awesome priority, but he can predict it and will just hover over it and punish, or reverse shuttle loop.
He won't usually go after you under the stage. He'll just use Meta Knight's speed on the stage to meet you on the other side. Then meet you with an attack. Especially if Pit is using there wings, as Meta Knight has many options to stop it. Though Pit is way faster than the Ice Climbers in this regard...
He also likes to start his stocks by going offstage and coming back with either a glide attack, glide cancel to another option, drill, or tornado. If he goes for the tornado or drill option, try to mirror shield it and hog the ledge. He can also cape infinite.
That's what I know. It won't help much, but those are some things to think about.