This is from semi-finals at my weekly. Any critiques are greatly appreciated. I have a hard time against this particular Ness player.
https://www.youtube.com/watch?v=d05EHBgMv-E
Hey man,
First off the Ness MU is tough, I don't blame you.
One thing I noticed early on from game one, at least in this set he barely dash grabbed. It was either PK Fire or dash attack. You were doing a good job in the neutral maintaining the distance required to avoid these hit boxes. I know it's not the best idea against most Nesses, but this one you should use run up shield option as he wasn't threatening you otherwise, in order to get in for a grab. At low percents you have just as much to gain off a grab as he does. Once you get in once this way, you can start mixing your approach up and really mess with his neutral game which is where he's beating you.
The name of the game in this MU is to gimp Ness as he has a his kill throw pretty early and Pika's can struggle to kill otherwise. You need to get in and establish dominate stage position and take more risks in your edgeguarding. It's intimidating as a misplay will get you hit by his PK thunder recovery but it's your most reliable way of getting up a stock on Ness.
Edit:
https://www.youtube.com/watch?v=aAVXuwpp5M0
If you look at this ESAM match he kinda plays it perfectly game 1. Short hop auto cancelled down airs are great ways to wall his approach while avoiding PK fire. He gets in several times on the dash grab, and pretty much let's Ness's recovery hit him as it gimps him most of the time, you just have to tech consistently.
Hope this helps, good luck!