Then you are not playing good enough Snakes lol. Active camping is not about shield pressure, it is about forcing you to react or get hit, while the other person is still really safe. Marth has to at least get close to you to hit you, Snake can toss sh** and it makes YOU move or get hit. Who cares about shield poking, if Marth is threatening to poke your shield then he isn't really camping, now is he?
I'm pretty **** certain that Marth by far is more likely to actually land a hit on G&W through his spacing as opposed to Snake actually landing any hits from his camping. If G&W approaches Marth, he can just shield, Up-B out of shield. Sure, it's not easy at all to approach Snake, but grabbing him or B-airing his shield can be safe in certain situations whereas it is NEVER safe to approach Marth's shield.
You can try ANY aerial vs Marth when he recovers, they are all threatening to him while he tries to recover especially Nair . His recovery is fairly straightforward and it orientated towards the edge (Upb is also Nasty against him since it sends him out horizontally). Snake can try to recover high, go for the edge, drop onto the stage from medium height with Nair, etc. If you DO hit Snake, he can usually still recover, he's not getting gimped or anything. Marth on the other hand is at a real risk of getting gimped or hit even more.
N-air doesn't kill Marth. The only aerials that can kill offstage are F-air and D-air, the latter of which has trouble KOing without the spike or when diminished.
Up-B is rarely viable against Marth when his recovery is ledge oriented.
Marth can just F-air or counter if you get close, and it shuts down all of your edgeguard attempts except for D-air edgeguard, which he usually survives at high percents or if he likes to ledgetech.
F-air edgeguard should kill Snake pretty easily at around 120% unless you diminished it too much. You can save the F-air and replace it with judgement for dealing damage to Snake offstage.
Snake's grab range is pretty good. And his Dthrow ***** G&W hard.
His shieldgrab is nothing notable. His boost grab is good in terms of range, but he definitely doesn't want to whiff it. You can easily not get shieldgrabbed, and it's not that safe for Snake to otherwise attempt to go for a grab.
Dair is not that easy to SDI, especially if the second or third hit trips you.
I'm not seeing this. I never have trouble escaping Snake's D-air under any circumstances. I only get killed by it if I literally fall into just the last hit. =/
If G&W shields, it stops any attacks from Sonic. It doesn't stop grabs. Dtilt stops grabs. But, oh wait Dtilt loses to PS/Waited attack. Here we go again into RPS
Sonic can't PS D-tilt if you know the spacing.
Edit: Sonic can PS Dtilt if you are trying to hit with the middle part.
You probably misread me. I mean hitting Sonic during the lingering frames where it is near impossible to dash up and powershield a stationary lingering hitbox.