Both awesome characters, but if draw isn't an answer then Knuckles wins in my opinion. Shadow needs a chaos emerald to use chaos control.
I am going to say A LOT so I can get this poll over with, and I STILL doubt this will help. By the way, Knuckles didn't win the poll through popularity, Shadow is the second most popular charater in the Sonic Universe while Knuckles is only fourth. 1. Sonic 2. Shadow 3. Tails (lol don't know what happened there, no offence to Tails ^_^'😉 4. Knuckles.
Nothing in 'Shadow The Hedgehog' was canon except for the beginning, the cg cut scenes, and the end, so the Diablon excuse is invalid, not to mention getting old. And even if it was, Shadow gets stronger with each chaos emerald he has and he had six, SO NO SHIT HE WAS GOING TO BEAT SONIC!!!
1. Knux's attack power is higher (according to Sonic Chronicles).
2. Knux's toughness (defense) is MUCH higher (according to Sonic Chronicles).
3. Knux is Omega's equivalent, and Omega trashed Shad in the future timeline of Sonic '06 (I know the game kinda sucked and made Knux look like kind of a derp, but the proof's in the pudding).
4. Knux doesn't rely on Chaos Emeralds, Air Shoes, guns, or vehicles to win fights. Yes, I'm sure Shad's a better marksman than Knux, but only because he's had so much practice. For the "ultimate life-form", I think he's pretty damn cheap sometimes. (And by the way, I'm convinced that without those shoes of his, he wouldn't be much--if any--faster than Knux.)
5. In Sonic Heroes (a game far superior to '06), you can choose to fight Team Dark as Team Sonic, and Knux can kick both Shadow's and Omega's asses. He sends them flying!
6. If Shad takes off his Inhibitor Rings, he is much more powerful than he normally is, yes, but I have to assume that he did so against Omega in the future (when he got desperate), and STILL lost. Besides, it seems like when he does it, he isn't disciplined enough to contain his own energy. Never looked too highly on that.
7. Shadow is basically Sonic's equal in terms of most of their combat abilities (both can use Chaos Control--along with Silver--both have equal physical strength, both are super-fast), and Sonic got the emeralds knocked outta him when he was SUPER Sonic in Sonic 3. By who? By KNUX.
8. Knux can lift more than any other character in the series, I believe. Maybe Omega can lift the same amount. Definitely WAY more than Shad can lift, at any rate... like, a hundred times more! It's believed he can lift over 100 metric tons, but that's unconfirmed.
9. Knux is quite a bit faster than Omega, as well. Third fastest character overall, unless I'm mistaken. Possibly tied with Tails, Rouge, and Amy. Might be slower than Blaze. Not sure on that one at the moment.
10. Humanity only "fears" Shadow so much because he's the one who goes around and destroys everything (StH), while Knux benignly guards the Master Emerald on Angel Island, not hurting anyone unless he's called to help.
11. I'm sorry to go down to the nitty-gritty level of over-analysis, but anyone who can split the hydrogen molecules... in the air... with... a... PUNCH... is worthy of nothing less than deity status, in my book.
12. Now, he never uses this ability against Shadow, but Knuckles alone can negate the power of Chaos Control, by chanting to the Master Emerald. Hell, it might even affect Shad's other Chaos abilities.
13. The guy can DIG. He's a pro at burrowing through the ground. He can also create earthquakes and fissures.
14. Shad might have the upper hand, just BARELY, in terms of balance and agility, but Knux has so much more raw, heavy power, I doubt it'll make much of a difference in the end. I'd say that Shad has the edge as far as jump height is concerned, as well, except that Knux jumped REALLY high (must've been at least a hundred feet) in SA2 to smash the M.E.
15. Knux can glide. Shad can kinda glide with his shoes but Knuckles' is better.
16. Knux is the only one to have ever broken the M.E. from the outside (with a punch, Chaos dropped on it. And besides, he is the spirit of the M.E). Not totally sure on this one, but he might be the only one capable of that.
17. Knux and Shad both have killer instincts. It's difficult to say who's the better tactician. I say Knux, because Shad can use Chaos Control whenever he wants (unless he doesn't have an Emerald). Again, unconfirmed. They both definitely have greater warrior instincts than Sonic.
18. Knux has worked hard his entire life for the skills he possesses. Shad barely even knows who/what he is, so psychologically, he's less purposeful than Knux.
19. Yes, Shad can blow his way through robots. But remember, they all can.
20. He can swim better than the hedgehogs because they can't even swim. -_-'
Yes, I am re posting this so shut the **** up. Plus I did edit this a bit.
Knuckles would most likley win.
Knuckles has speed. Remember, every couple of pixels in "Sonic & Knuckles" represents a mile and he was close to Sonic in speed. And even Sega has said Knuckles' strength is the equivalent to Sonic's speed. Sonic can run faster than light, and if you don't believe me than here w w w . t h i s i s f a k e d i y . c o . u k / a r t i c l es/g a m e s / h a p p y - b i r t h d a y - s o n i c on number 5 it was posted by Jazwares (Sorry for the spaces, won't let me post this otherwise...). That would make Knuckles godly strong. He is strong enough to split the hydrogen in the air by punching. When he punches, fire covers his fists, and a punch to the ground can cause fissures. Can Shadow do that? No. Knuckles is by far, without a doubt, the physically strongest thing in the Sonic Universe. And not only does the Red Rad have speed and strength, but skill to boot. Knuckles is an expert in martial arts, if you don't believe me read the SA2 manual. Knuckles has senses beyond anyone in the Sonic series, too (except maybe Sonic), so spinning in a circle is not going to stop him. He is also smart. And yes, Knuckles can go super and even beyond, and has done so in the games and comics. Shadow has never gone hyper either. The only way he might lose is if he loses his cool, and being Knuckles, that can go both ways. He has a huge temper, but despite that can keep his cool pretty well.
Shadow is not the same speed as Sonic (said in one of the game manuals but can't remember which one) and if he has to use a gun, Knuckles can still dodge it. If he can fight Sonic than he can dodge a bullet. When was the last game besides "Shadow the Hedgehog" he has ever used a gun anyway? And if Shadow has to be desperate enough to use Chaos Control, I doubt it would do much. If Sonic can do it, I am sure the guardian of the emeralds can figure it out, too. Plus he can negate the Chaos Emeralds power so he could possibly block out Shadow's powers.
I seriously think Shadow is over rated. He is popular the same reason Sasuke is, because he is an emo priss that thinks he is better than everybody and the fan-girls over hype about him, though he is not nearly as bad. I am not saying he can't fight or be cool at times. In fact, Shadow is one of my top five favorite characters, 1. Knuckles 2. Shadow 3. Blaze 4. Sonic and 5. Espio and Shade (can't decide), so I am speaking as a Shadow fan boy, too. I am just saying he is not the strongest creature in Sonic that everyone thinks he is. Sorry I wrote so much....