Cute fat pixels work good
They're chuby now that I look at them in the pixel. (influenced by Eniä's comment.)
I like there colours in the spriting however their hats have very little differentiation between the shapes. They all look very similar. I think harrys could have been straighter in the back of his hat and could have made his hat more flat in that sense Wallys isn't really that pointy. Larrys is fine though.
That's my only input.
Now your 3 little bandits ave sprites now. Sweet.