What can MK do that ROB doesn't have some sort of answer to?
Tornado? Obvious but...just Nair if close, laser if far away. If you get caught too close, DI out and then punish with an nair.
Dair camping? Let him...he'll run out of jumps eventually. Punish when they're done.
Planking? Gyro.
Air Planking? Gyro.
He caught your Gyro? Now all he can do is throw the gyro, go **** his ***.
If you're recovering, either recover as high as you can, or if that's not an option, recover as low as you can. If you recover high, make it your priority to touch ground. If you recover low, rising Uair when you know you'll hit him. If you uair too early, he'll just dair you or something. Not good. Your Uair outranges his Dair though, so if you time it right you'll always win.
Space with ftilts. Laser at every opportunity. Kill around 110 with fresh bair. You want a gyro on stage at all times. If you can get a Usmash, good ****.
Preferred Neutral? Battlefield.
Preferred CP? Lylat...Halberd...
Preferred Ban? Delfino. You really can take him on Cruise, but...yeah, it is REALLY annoying. You have to really try to make sure you're never above him, which is possible...just annoying. Gyro is **** here.
Also, random cruise glitch: If you grab the MK on the blocks that drop when you stand on them for too long when you're NOT on the blocks that drop when you stand on them for too long, Fthrow and he'll go through the blocks and die. I don't know why. But it works. You can just stand there and bait him until he runs into a grab.