Woah woah woah. Waaay too many dash attacks. It's good that you're wavedashing back and looking for an opening, but the dash attack is super predictable and super punishable.
I like the use of the jabs though, it's very nice.
Don't be scared to go out and gimp him with the fair. Also edgehogging or lightshield edgehogging is your friend.
The utilt is a good attack but it doesn't have as much horizontal range as most of your other attacks. As such, you should try to use it after like a tippered fair or some such.
I would dash dance a little bit more, because righ now your approach is telegraphed a lot which is why you're eating a lot of fsmashes. Nice Ken combo though.
Second video.
HEY! Brawl nom nom noms your tech skill is MY line!
When you're edgeguarding Ganondorf, try facing away from the ledge and using a dair spike.
You're a little too predictable on the edge... try ledgestalling once or twice and then ledgehopping something so you don't get punished so much.
Your shffl'd nairs are pretty good, but your shffl'd fairs look a little high to me, so there's a lot of vulnerability time between when your fair ends and when you hit the ground.
I dunno how good of an idea trying to hit people with your recovery is. I would fastfall and then sweetspot, or if you're that high, hit them with a fair or a Counter, even. If you Dolphin Slash all the time, they could catch on and airdodge instead of attack, then land and punish your lag.
2:56 should've definitely been a ledgehopped dair for the spike. You seem averse to ledgehopping attacks, which is a little strange to me.
At 3:13 if you ledgehopped a uair or just ledgestalled, you would've been fine...
3:27 another ledgehopped dair for the spike...
You should really try not to descend straight onto someone. Yes, your dair has a lot of priority, but it still probably won't turn out well for you.
But yeah, ledgehops and dash dancing. Maybe a few more grabs. Oh, and definitely pursue people off the stage with softspot fairs for the gimp. Or even a reverse Dolphin Slash. And... yeah.