It's fine to do edits or reuse other bits to help you, but it also makes it hard to give feedback on the ability of your spriting. Working from scratch is good practice.
Bits of those sprites look like they were taken from other things. I think the boots and face are edited from my Zamasu sprite. Are his hands from Extreme Butouden Broly?
And Alpha, the knockout animation is crazy old. I based it on the sprites from Super Butouden, and you're right that it's a bit rough. To me it's not worth going back and redoing it from scratch, as we're moving on to another character. Not all the frames will be amazing looking, but it's pretty decent for my first creation.
The sprite quality for my next character is a big step-up, so far. I'm excited to show everyone!