IDK, I don't want to seriously hate on Sackboy yet since the game is new and I can see him being countered by some characters (Sly maybe?), but he is without a doubt my most hated character so far. No one frustrates me like he does (Although based on the reactions I've elicited from other players, Fat Princess might be about as bad.) and as BS as I thought his level 3 was, it's even worse in teams. I fear the day I run into dual Sackboys. As soon as 1 hits level 3 they both do, and who knows, maybe they'll even get enough AP through the two to do it again, assuming you haven't lost all your stocks yet.
Well since people have problems with him, I would say as a Sackboy player my weakness is really good Sly players. In FFA I usually go for someone else if I see that the Sly is good, since we would be in this one on one fight that takes forever to build ap. So Sly is basically the counter of Sackboy.
Radec and Sackboy are keep away characters. If they annoy you, that just means they're doing something right.
So when I was playing Killzone 3 online, and camped in a corner and ended the match with 29:2, I was playing legit? Glad to see PS3 gamers aren't as infuriated by campers as 360 gamers
fat princess' attacks break through a lot of sackboy's traps, Raiden's sword cuts them too, jack can ground pound and still hurt you, spike can stun and break the traps, Big daddy can do an areal charge and break my defenses, Nariko's disc throw breaks jelly and still can hit me, hieachi can stomp and break them. You guys just have to approach him differently. He's not a heavy melee character so don't expect to go fist to cuffs with him.