Food Fighters

[Garamonde]

The shading on the third one definitely looks better. You want to avoid dithering for the most part especially for sprites like these since it's mostly only used to add texture and/or create mid-tones in sprites, and because the helmet's made of metal, it would be shiny, rather than textured. Try adding some shininess to it (I would suggest looking up references on how metal helmets are shaded to get an idea), because as it is now it kinda just looks like a big helmet-shaped cooking pan.

As for the tomato I believe Tonberry may have been referring to the saturation, since tomatoes tend to be bright and vivid in color.

For the hotdog I can't really pinpoint what's wrong so I'll leave it to someone with a more experienced eye.