I need some help on the mk match up I played light at planks tourney and didn't do so great most likely cuz I have almost no experience in that match up (surprisingly as it sound) and he told me to try to grab a lot more but I need more help then that any advice Bwett???
First off, you have to force MK to approach you so eggs are essential. You need to be atleast 2 roll distances away so you have enough time to react to his advances if he runs under your eggs. You should always keep that distance when not physically attacking.
A good strategy is to alternate between empty bairs and ETS at that distance, and if MK dashes, then pivot grab. Pivot grabs will keep him at bay on the ground. Don't worry about just throwing out 3 pivot grabs as a spacing tool. It forces him to approach you from the air.
Once he is in the air, try to punish him using usmash, uair, and eggs. Preferably throw 1 egg to force the dodge and then do a hyphen smash.
A big part of playing against MK is knowing what moves beat his. The safest bet to assume is that usmash and grab beat everything of his. There are a few things that are strange. Usmash can clink with glide attack at times. You might get sucked in tornado while usmashing. One thing that I cannot stress enough is the use of your fsmash at key moments, ESPECIALLY when he is gliding. When timed properly, fsmash will always outspace and win against both glide attacks and will wreck them hard. The funny thing is that they are so used to the fact that their glide attack clinks or beats everyone that they will try it multiple times and you can get easy kills that way.
Bair to utilt is good but don't get too predictable. Mix in egglays so they don't try to shieldgrab you. When you are above MK, it is less risky to do a dair. It is strange in the fact that it can either clink, beat, or lose against shuttle loop, but its better than dodging in some cases. If you do hit dair on him, fast fall with it and follow with a falling uair and then a rising uair.
If you do get a grab, because dallas tends to get out of my grabs, I tend to follow immediately with usmash. If they are at low percentage, you can follow with jabs and a possible second grab but they do have time to dodge. If they do dodge, just run past the dodge and pivot grab them. If they are at higher percentage, follow their DI and count the jumps. The second before they land, go for the regrab. They will be caught because the airdodge animation will be canceled by the landing animation.
If the MK tends to be dash grab happy, then use pivot fsmash to punish like I did to those MK's. It works wonders. It is situational though. DO NOT under any circumstance follow MK off the stage. It is a high risk, low reward situation and can result in you being gimped. Just egg them and prepare to punish a glide attack with fsmash. Don't be afraid to spotdodge an attack followed by downb. Because of MK's light weight, they get wrecked by this move.
I can't really think of much more at the moment, but if you or anyone have any questions, just hit me up.