Question: How does Link lose to Kirby? Kirby cannot contend with his range and projectiles and will die in a few hits and Kirby doesn't have the mobility or range to properly approach Link. Sure, up close he loses, but Link can keep Kirby away for days and he doesn't have a lot of ways to reliably approach. I might be wrong, but i don't think Link loses to Kirby.
Kirby might have some cons, like what you've explained, but Link can get juggled by Kirby hard; now of course, Kirby's attacks aren't usually safe on shield, with some exceptions, but most Kirby players will get me when I usually try getting them while they're in air (and they end up air dodging into a punish). I can't do my normal techniques against Kirby, but if I started doing a different strategy, Link and Kirby would be even; however, since I do my primary strategy, which is the set ups from Bombs and using impromptu zoning and waiting for the opponent, Link can lose to Kirby since Link gets juggled and combo'd easily. Plus, Kirby is extremely hard to even edge-guard and yet edge-guards Link very well.
I think it's interesting that you put Pac Man as a losing matchup. I feel like Links consistent disjoint and kill power would be enough to at least make things even. On top of that, Link can put out projectiles at a faster rate than Pac Man, essentially beating him at his own game. Then again, Link may be susceptible to a high level Pac's pressure. I just struggle to see it playing out in Pac Man's favor.
Overall your list seems very biased via your personal experience, and your post clarifying the Dedede MU only solidifies that ideal. That is fine, but know that there is more to the way matchups work than how hard you beat players worse than you.
Edit: LMAO how did I not notice you put Sheik as a winning matchup? I love you Larry but you're crazy haha
Well, even if Link has better projectile game, he often can't beat Hydrant and all of Pac-Man's Hydrant shenanigans. On top of that, Pac can get out of Link's D-Throw combos easily with his F3 N-Air and has decent set ups against Link. Off stage, Link can literally get edge-guarded to death if one hit from Pac's F3 N-Air or his B-Air and F-Air connects. Though Link does have boons against Pac-Man with kill power, and even IF I won against players, if I fought a really good one, I know I'd lose against them in a match.
Secondly, biased or not, my experience with various characters gives me my own opinion about them against Link.
Any match up chart that gives Link a winning matchup over Sheik is not worth discussing. It demonstrates a fundamental misunderstanding of Smash Brothers 4 on multiple levels.
I don't want to belabor the point, but if Link had a positive match up with Sheik, he'd be the second most used tournament character and everyone would have a pocket Link.
And also, you want to know why Sheik is a winning MU for Link? Why I think Link is the only "low" tier character that can take Sheik on and win? That's actually worth discussing more than you would think; and no, I don't have a misunderstanding of Smash 4. Just because a character can beat Sheik in someone's opinion doesn't mean that the character is going to be used in tournaments. Just let me give my take.
So let me tell you something about this: Never have I been defeated by a Sheik player. Not one time, no matter where I went, has a Sheik player actually taken me down, whether it was a tournament, Anther's or any good FG player. While I loathe MK and R.O.B, Sheik is a character who has never, ever been a problem with my Link whatsoever. Why? Because I know how to fight a Sheik player efficiently and know about her weaknesses.
So what's going on, then? Why do I think this way?
Look, Link might be harmed by Sheik's great combo ability, her throw combos and even susceptible to being edge-guarded by Sheik and hurt by her needles, killed by Vanish and so forth, but that doesn't necessarily mean that Sheik beats Link. In fact, it might actually be the other way around. Aside from Sheik's usual quips, what more is there for her against Link?
Link, on the other hand, has a surprise when it comes to CQC, which he can win if he manages to activate his attacks before Sheik does. What I mean is, if Sheik goes for a dash attack or dash grab, Link's Spin Attack works wonders for its speed. If Sheik goes with any aerial, Link's U-Tilt or U-Smash will work, depending on how much distance there is. Link is no slouch despite his frame data, because even if his attacks are slow, they are some of the most powerful in the game, and even if Sheik makes just one minor mistake, she's gone.
With recovery, Link can actually challenge Sheik's recoveries; if Sheik goes for a Vanish, Link can go for a D-Air into a potential "No-Tech Zone" stage spike. If Sheik goes for a Bouncing Fish, she's dead thanks to Link's F-Air and its range and knockback. At 50%, she won't recover from it unless she has a second jump. Furthermore, if Sheik aims for the stage with Vanish, it's not like Link's going to be where she's going to re-appear; he'll be slightly to the side, just so he can grab, F-Smash or Spin Attack her.
With Sheik's aerial options, she actually has some very poor options when coming to the ground against Link. While ZSS has Flip Jump and Ryu has Focus Attack, if Sheik uses up her Bouncing Fish and second jump, the only remote things she has left are her D-Air, which can be beaten by Link's U-Air or F-Smash (if she lands), her Needles, which are not good in the air or Vanish, which would only lead back to the F-Smash or Spin Attack.
Let's talk about platforms. If Link is under Sheik in a platform, expect a shield being broken after two F-Tilts and an F-Air if a Sheik player, if on Battlefield for example, stays in shield too long. If they roll, F-Air will hit them. If they jump to another platform before Link can pull out F-Air, Link might use a different aerial or attack altogether. Link is really good under the platforms and if he blocks while he's above Sheik, who might use B-Air, F-Air, U-Air or N-Air, he can punish with a swift Spin Attack, U-Smash or D-Smash.
Link's also got his Bomb set ups, which are actually tremendous against Sheik on contact; they'll lead into combos or potentially even Sheik's death if Link is spaced just right.
As for get ups, I forgot to mention Link's three best get ups. Link has F-Air, which despite being F14, is still very powerful against Sheik when he gets back up. He also has Z-Air, which, if both hits connect, can lead into a grab by Link (I've figured out from new matches that Z-Air can lead into a grab on opponents). He lastly has Bombs, which just makes Sheik either shield for a potential grab or get hit for a potential follow up.
Lastly before I leave, Link's N-Air is a decent move against Sheik for its power and its dirty, late hit, which allows Sheik to fall onto the ground without a tech and Link to potentially F-Tilt or F-Smash her. In the end, I've used all of this to beat all of my Sheik player opponents, and it's my opinion that Link can potentially defeat Sheik in the game, and might be the only character to do it. If not 60:40, 55:45 in Link's favor would be the lowest for the opinionated MU. Sheik's not impossible for Link.