You haven't played a G&W that shieldcamps correctly then. Sonic literally can't touch G&W at all if he knows how to shieldcamp. Anything he does on G&W's shield gets punished. If G&W needs more time to restore his shield, he can just edgecamp for some time, then get back on stage.
If you run away, and go near the ledge, and then I B-air you, you get hit.
If you try to punish something, but I anticipate that before hand, you get shut down by B-air and a number of other things like Up-B out of shield, Up-smash, etc, etc. Since you can't punish any of G&W's Smashes on block, your shield won't last forever. You can't edgecamp like G&W can, so you have to go in the air or roll at some point to get away from him before he shield pokes you.
If he DIs well, most of your KO moves don't work reliably until like 140%.
G&W should KO at like 110% easily with a fresh F-air or D-air. He should be surviving to like 160% with Bucket Braking. He only dies early if he spaces SUPER HORRIBLY on a charged F-smash.
But seriously, Sonic doesn't have any good answers to G&W's shieldcamping or edgecamping, while G&W in a few situations can rush down Sonic with the B-air (not always, but the point is G&W has situations where it's safe to do that, while there are really no reliable situations where Sonic can rush down G&W at all). He KOs earlier with pretty much anything. I'm pretty convinced at this point it's one of Sonic's worst matchups by far after solidly beating a fair number of Sonic mains who were able to beat my Mario.
G&W's KO moves have enough knockback to the point where DI doesn't matter against him. If he knows the percents, which he can get you to easily if he's patient, you just die regardless if you get hit by his KO moves.
For Sonic against G&W, landing enough hits is actually an issue.
The way I see it (and the way it has always been for me for the past few months) G&W pretty clearly survives a lot longer than Sonic.
They haven't played me either than I guess... anybody can be in the neutral position at the start of the match... I know better than to approach G&W because of his tools, and I have no reason to approach with that mindset... not to mention G&W can't going to force one, I happen to be very patient. (Bacon does not count, it is slow, and too easy to punish with FTilt)
LOL insta-edgehog and G&W approaching me or jumping offstage/out of the way to let him whiff his Bair... C'mon man, both characters can play gay, why would G&W be any different? His Bair isn't
THAT long.
IF, the keyword... you won't do it right everytime, and even matchup discussions have their limits on how far both characters can be perfect. BTW I have been able to punish G&W's attacks... perhaps the player was not frame perfect, but it's somewhere close, I've done it, and you cannot disprove that no matter how hard you want to try without having to get frame data ofr a helluva lot of things... besides that, punishing is one thing, but being able to react with things like an Up-B, be it out of shield or not, have to wait for things like... oh I dunno... Lag? Deadframes exist, and Sonic players always work to find them because they can only do so in this short timeframes.
Again,
IF! I doubt they'll get it dead-on all the time, and besides that, there's only so long before you get pinned, like say you get FSmashed near the end of the 2nd stage of Castle Siege... I'd like to see you DI that. It's not always going to be on Final Destination from the other side.
Both character can live at the same percent, G&W isn't the only character with a a momentum-killing move. BTW unless I'm really screwing up, I don't ever see my opponents live past 150%, in which case I'd just play to rack-up damage to post 200%, and go for the grab... U-throw kills in that range... however that shouldn't even be happening... unless as I've already said, I screw up bigtime. Yes I'm willing to admit I mess up here and then.
Not approaching is one way to answer it.G&W's shield can be poked.
I'm not convinced unless you make names, in which case nobody has probably heard anything about anybody. He may have an easier time with K.O.s, that which I cannot deny, but that doesn't mean it's going to happen all the time, and I also explained why Sonic is going to be living longer than G&W unless somehow he happens to land an USmash (not going to happen every other second -_-).
Sure, if I can get you at the ~110% range, G&W won't be able to live to my Forward smashes either! ^_^ Again Sonic players can play campy if they want to, contrary to popular belief.
It could or it couldn't be, but personally I see little trouble to it thanks my multiple experience with very good G&W players... I can always pick up on G&W's deadtime in which he can't do anything, I assume other Sonic and G&W players alike would do the same thing if they wanted to get anywhere in tourneys.
Well now I hope you realise that Sonic is G&W but heavier. The only reason he would be dying any sooner than G&W, is because he fell into some stupid junk... I haven't been killed by an USmash iv forever, it's always DSmash because it has more range... but man how easy is it to land a FTilt OoS when you get hit by a Dsmash, huh? It's funny because most of the G&W players I face get so scared of me that they release the attacks as I get to them, but I always put up a shield, and my PSing against G&W has gotten so phenominal, that unless it's a Dair/Bair, I won't really have any trouble. :D