RBS Line System

The new line system in RBS is somewhat difficult to grasp, but it will definitely act as a positive system of offence if you master it.

1- What use does it have?
By line swaying, you can dodge opponent's moves and projectiles. In fact there are some moves like Krauser's Kaiser wave which can't be dodged in the same line, or Sokaku's SDM which is totally unguardable. You can also piss off beginners.

2- What demerits does it have?
Although you can guard any moves once you are in another line, you are totally opened to attacks during the time you are moving to the other line, and right after you get there. Thus if you decide for some awkward reason to line sway while your opponent is right near you doing nothing, you can be attacked and comboed. Also, jumps done while the opponent is on a different line can be used to dodge line attacks, but you cannot do any attacks while in the air.

3- What should be done if the opponent line sways?
You should attack them of course. You can move to the other line without doing any attacks with the D button. You can punch youself to the other line by pressing the A button, and you can kick yourself to the other line with the B button.
Although there is good reason to kick to the other line with the B button(which we'll discuss later), the normal attack to the opponent should be done with the C button, which sucks the opponent to your line, either guarding or not. One reason to suck your opponent to your line instead of jumping to theirs is so that you won't go into the opponent's projectiles, but another is because the C button attack can be comboed.

4- Extra tips

KICKS
Although the C button line attack is very useful, the B button kick can be as useful as well because, depending on the character, it
can't be guarded standing or crouching.

Characters with B Button Line attack which cannot be guarded standing
Joe
Duck
Billy
Mary
Sokaku
Hon-Fu
Chon-shu
Chon-rei
Krauser

Characters with B Button Line attack which cannot be guarded sitting
Terry
Andy
Mai
Kim
Bob
Franco
Yamazaki
Cheng
Tung
Laurence

Awful Abuse of Line Sway

If you are fast enough to line sway right after you get the opponent on the ground, try lining up (or down) right on your opponent (on the opposite line of course). Right when the opponent gets up, do the C line attack. The direction of guard in this situation becomes very severe, and in most cases (human cases, not against CPU) the C attack will hit, leaving a chance for a fierce combo. If the opponent line rolls, throw them.
To use this tactic, you will need to use a move which leaves you free to move right after the opponet falls on the ground, like Andy's Quicksilver Elbow or Mai's Dragon's Flame tail.