Here are some thoughts on characters I play:
is a solid high tier but too undertuned to be top tier. A lot of his bad MUs go something like "YL would win or be even with this character except they kill him 50% earlier than he kills them". He has one of the best projectile zoning games and a great combo game making him one of the best characters for building damage. YL gets the best of both TL and Link's worlds with Link's amazing landing game and TL's zoning game. YL has 3 aerials with only 6f landing lag. His arrows are by far the best of the 3 Links and very spammable. Nair is f4 and one of the best moves in the game; it outbuttons most of the cast in the air. Dsmash hits almost entirely horizontally and is amazing vs bad recovery characters. I say "best" a lot but darnit YL has some amazing tools.
To balance all this great stuff his sword CQC game is on the slower side of sword character frame data with things like a f6 jab, f8-10 tilts and a f12 tether grab so they're not awful but lose to characters like Chroy. YL's sword isn't as long as primarily sword characters', he's light at 88 units and has poor kill power outside of Fsmash, which is slow.
YL's basically SSB4 Peach: a highly technical character who's good but there's no reason to pick him up over top tiers who have an easier time winning. Expect to see him pop up in some top 8s but never dominate the meta.
is a weird hybrid of a slow heavyweight who trades weight for zoning tools. His reach is on par with Ike's and he compliments sword zoning with 3 projectiles. Boomerangs are one of the best moves in the game, better than Wolf's blaster because they combo into Fair up close and have a returning hit which controls space for a long time. Link would be much worse without it. While Link lacks YL's combo abilities he has a much easier time killing. Remote bombs are amazing offstage.
His downsides are poor frame data even for a sword character, poor mobility and blindspots. Fair for example cuts along the Z axis and only has hitbubbles directly in front of Link as opposed to Lucina's which has a wide arc.
Link's probably lower high tier. Similar to YL, he'll show up in some top 8s but not often.
Everyone knows about Lucina. She's basic but has amazing coverage with quick disjointed moves. In 6-8 frames she can hit anywhere in a wide circle all around her. UpB has f1 invulnerability and she has a shield breaker for big punishes. Lucina's not falling out of top tier short of being nerfed. She'll always pop up as a pocket character when players like Leo need her.
has been placed as the best super heavyweight by some players but I disagree. He has the heavy character polarization where on good days he looks high tier but on bad days, low tier. Even moreso than other heavies because he can kill you at 60-80%+ with huge smash attacks but gets gimped at the same %s with his bottom tier recovery. He has good reach with his sword and long legs but poor frame data. Ganon's scary when he gets going but can also be shut down hard. He's one of those characters who isn't in control 90% of a match but kills you in 3 hits.
As such, Ganon's a solid mid tier. He's basic like Lucina but won't see her levels of success.
also has the heavy character polarization. He has major issues with the biggest hurtbox in the game and a ton of endlag. He also has some great tools like getting 20% off every grab and belly armor on attacks which gives him a strong mixup up game. Off grab, Uthrow deals 19.2% so no matter how hard you mash you're eatting a big chunk of damage. At later %s Dthrow buries and combos into his f5 Utilt. Around 100% he can play a guessing game off Dthrow where his f6 Usmash will kill you if you pop out early but another smash will kill you if you don't mash. Then around 140% he can Dthrow>Ftilt kill which will probably beat any mashing.
Like DDD he's a zoner/bait and punish, tanky super heavyweight. Cannonballs and crownerang give him projectiles to work with, crown having KB based armor powers through other projectiles and he has a reflect/counter. Cannon balls can be good up close if you transfer into suction.
K.Rool has a few other tricks like Dsmash has belly armor so Dsmash on a platform beats platform poke attempts which aren't disjointed. Dair is great at 2 framing recoveries and in general K.Rool has huge hitboxes offstage including armored Dair and Nair for gimping.
His recovery's long and he lives forever but lacks the raw power of Ganon or Incineroar.
He has some good tools but all the super heavy problems and limited hitboxes. K.Rool's attacks are fast to start, often with a lot of endlag, and don't have great coverage. Utilt for example doesn't cover entirely above or behind him at all. It's not that his hitboxes are bad but on such a huge hurtbox he ends up with blind spots, which sucks considering how hard he gets juggled. Still a f7 belly armored Nair and counter with f4-15 invincibility is better than what a lot of heavies have.
I think K.Rool's better than low tiers and the 300+ tournament he won is better than any low tier's results. Part of his success comes from being so darn tanky. Like Ganon he gets destroyed in disadvantage but he can take a lot. He's not as good as I thought but not a terrible character either. K.Rool takes a different mindset to play than other heavyweights. It's all about zoning and frame trapping with belly armor or grab mixups.