ok for those of you that said i havnt done my research or barely played it, iv been playing brawl a lot, and just got done playing with mew2king this last weekend (the two of us stayed over velocity's place but thats besides the point), so we got hours and hours of brawl in and hours of chain grabs since m2k mains kd3 (and marth).
ask m2k yourself. for the characters that get trapped by it, you CAN NOT escape. the only way is if kd3 trips while doing it. and we tested it on a large variety of characters. not EVERY character, but most of them. so far we know the following CAN get out of it by rolling after the first grab: game and watch, zelda (i think), olimar, jigglypuff, and we assume squirtle but didnt try it. it generally seems that only lighter characters get out of it. if your character falls over after being thrown, u can get out. if you dont fall over (watch the animation) which most characters dont, its unescapable.
differences between this and wobbling. wobbling did eventually become banned in melee towards the end as it really didnt become popular till later on. wobbling is a more difficult maneuver to do with timing the hits. all kd3 has to do is grab down throw run grab. its that simple.
the chain grab can lead to death easily on stages with walk off platforms. we shouldnt be expected to ban every walk off stage since there are a lot of them. normally legal stages with walk off platforms: bridge of eldin (possibly legal), delfino plaza, castle siege, green hill zone, mario circuit, and possibly others.
if your not on a walk off stage however, it still racks up completely free damage, and a lot of it if it's across the stage. it will always put u off the stage automatically, making u be set up for an edgeguard even if the chain grab starts at 0.
i did say where we can draw the line: "For instance, no one is allowed to down throw chain grab with Dedede 2 or more times. Like they can be allowed to grab, down throw once, grab, but can not follow up with another chain grab. They could do another down throw if they wanted, but they can't follow up with a grab, and can instead do something like a ftilt."
clearly if u guys didnt kno its unescapable at all percents for over 30 characters in the game you guys havent played it enough
o yea and i put this here not in the kd3 forum cause its talking about competitive play as in tournaments which affects everyone