Oklahoma...ever play KOS-MOS? He needs to come back down to Texas, lol.
First video:
-A little bit too much dair on shield. If they sheild it, it's usually best to do a retreating nair or just double jump/footstool away altogether.
-ROBs love to use lasers, so if you're far away from a ROB, just be prepared for one. I'm surprised the ROB didn't use that many Gyros...
-Never repeatedly jump up from the edge, because a good player will read it and then spike you, as he did. Mix it up a little bit more.
-Never nair of the stage unless you are really sure it will kill the opponent. If it misses, you're probably going to get edgeguarded.
-Don't charge smashes as much. More often then not, they will still miss, and you'll get punished with a projectile to the face.
Second video (I assume you meant
this video since the original link is the same video as the first):
-Learn to be more tricksy with armor pieces. You can Z-drop and Z-catch them or throw them down, glidetoss, etc. You don't need to be fancy if you don't want to be, just throw away the pieces if you don't want ZSS to use them.
-You can outspace ZSS with Fsmash. Her SideB can challenge it. Use Aura Sphere if she keeps using run away SideBs.
-Once again, mix up your recovery from the ledge. You got punished several times when all you really had to do was to get up normally or even use the get up attack.
Third video:
-Be careful about wallclinging too much, because some people will run down and bair you (Melee tricks ftw). The Kirby almost got you because of it.
-Wallclinging on Yoshi's is weird. There are certain spots that you cannot cling to, despite the appearance that you can. Just play on the stage more and learn the general areas. I don't even try to cling to the walls near the edge, because those areas don't seem to work.
-I can't believe the ghost saved both of you, that was awesome. You know the placement of the ghost, so that's good.
Overall:
-Work on DI a little. You died kind of early in some of the videos. But you did have some good moments too.
-Consider fair->nair more instead of double fair. Nair was hardly used, but it has virtually no ending lag when autocanceled.
-Some more grabs. Not to say you should get grab happy, but if you see an opportunity in which your opponent is open to one (i.e. shields a lot), just grab them. Also, consider Force Palm grab as a potential kill move at higher percents.
-Work on getting back from the edge.
You have a pretty solid Lucario, you just need to refine some things. Otherwise, keep at it!.