You a good artist. You have a kind of cartoony look to your drawlings. But, some pointers is you may wish to keep them a biit closer to actuall human anatomy. Krystal's head is abnormally large and Peach's lips were a bit big. Beyond that, it's good. Also, props for make redesigns. It's a lot harder to make something that looks new and still fits the character.
Also, thanks for not making the Krystal pic a furry pin up. She'd be a much cooler if she wasn't oggeled by furry fans.
Was going to make a "change" American Kirby, but I'm not that skilled at Fireworks.