Just got this game recently (really good). I just unlocked Captain Aizen and there's on thing I can't seem to get and that is what does his Super B do. I know it changes all button attacks to projectile attacks but sometimes a copy appears and I'm not sure what the copy does. Am I using it properly or am I just stupid? Also anyone know any good combos for him?

Great question! There seems to be only 2 SuB loops for Aizen. First off, you must grab them or hit them with Six Bars to stun them. This gives you enough time to use SuB while they are still in the stun. While they are still in the stun, do 426A (Light Lightning) immediately and then dash in and do sL, sM, sH (standing light, medium, heavy) and right after that do the lightning again followed by the sL sM and sH. Repeat them until the SuB is about to run out and then knock them into the air with the cH (crouching heavy) for an air combo. The other is quite simple yet may be harder to do for beginners. All it is is Light punch (Y) dash in and Light punch again. To do this I recommend practicing with Rukia as she seems to have the easiest version of the standing light infinite.

When I started playing Aizen I didn't rely on his supers as his SuA can be easily blocked since it can be damaged canceled even after it activates. His SuB can be pretty hard to get at first but once you start learning the game and other characters it'll become much easier to do.