@noaa Big Band is one of Squigly's harder matchups, his cymbal is very hard to deal with since he displaces himself when activating the move. To deal with cymbals, you need to 1) hit him while he's in his start-up frames so you get a counter hit or 2) block. There are probably more options, but I often use those 2 options against Band. Also, I'd recommend using M Bomber against BB since it has a much higher chance of catching him falling after cymbal allowing double to land easy damage on him. You can play full screen against Band using Seria Tremolo to counter hit Giant step, but once you do it once, the BB will probably try to rush you down. my advice is to abuse the fact that j.lk and j.lp are instead overheads against him and confirm the hit into H Divekick. From there, use Seria Cancels and assists to continually reset and force him to hit the panic button(i.e, Extend, Super, Assist call).
Fukua, I feel, is a pretty even matchup, maybe SLIGHTLY favoring fukua with certain assists. The same thing with BB, you can choose to play fullscreen against her, but it's your disadvantage. You can attempt a Seria Center Stage into SBO, but if the fukua knows about this, they can cancel every one of their normals and specials into BFF, giving them a free counter hit super into combo. My preferred approach to this matchup is to force the Fukua into uncomfortable situations and benefit off their mistakes. So what does that mean? I put myself in a situation where his normals will whiff and M shadow is unsafe. I try to stay at this range and use my assists to punish any aggressive move he makes against my Squigly. Please message or add me on steam if you have anymore questions about these matchups as well as anything Squigly-related
In regard to hit-confirming with Squigly, every air normal can confirm into H Divekick, which falls into a combo. On the ground, if you can chain into s.hp, you can always seria cancel or stanceless cancel into another ground chain, and lead that into Silver chord for more damage. For your assists, I'd run M Bomber on Double and Theonite Beam(H) on Robo Fortune. Also I'd think about running Robo-fortune on point. I hope this helps