Any chance of releasing your version of Buttercup anytime soon ? IMO She's really good. The only thing I'd change is giving her a green trail instead of after-images when doing this attack 6:15 and perhaps have a ground pound attack similar to DG's version. Other than that, I hope you'll release her soon.
Ideas for Bubbles, New Victory where she're doing the coloring, and sings too, Bubble Traps, Bubbles shoots a large bubble, hovering around, when the foe touches it, they will get into trapped inside, similar to Rain's move, Boomer appears! saying "I know you are but what am I?"