The sprites are kinda choppy and shading needs work, plz.
The overworlds.... um.... I'm not quite how to say this, but you need to brush up on them. A lot. I suggest looking at actual nintendo Overworlds and taking a good look at them and study how they're made, and not just slapping default paint colors and obscure hat on. XC
PRACTIVE MAKES PERFECT AND YOU PLENTY POTENTIAL! YAY. :D
I like the characters, BTW. Thier concepts look great.