Digit-5 and Project Captain N

[SmithyGCN]

I know that you're going for a uniform base for all your humanoid characters, but the idle standing pose for each one is pretty static and uninteresting and says nothing of the characters' personalities. It might even help your Samus if you found a better pose for each character. As for Samus in this pose, you might want to make the shoulders not so close to the head.
For Kirby, I think the gem looks fine, but you could get more mileage out of the palette by reusing the colors for Kirby's skin with his gem.