Whelp, I just noticed someone one this forum changed their avatar to Grand Dad, so cool. As of now as I'm posting this, I'm making Omega Flowey by scratch, having the sprites (thanks TurretBot, oh and, just wondering, how did you get them?) of course. And once I do that, I'm gonna recolor it to be in the palette of SMB3 for SMM.
Here's my progress: