Bob-Omb Sprite

[Star]

First off, this is not a sprite. This would be known as an attempted pixel art if you wouldn't have stated it being a sprite.
I would start off WAY smaller before you make something big like that again. Big stuff like that should be more detailed and have alot more experienced techniques like dithering or AAing into it.
Second, never use MSPaint's default tools like the circle tool, they never come out right. For palletes, NEVER use the MS Paint defaults. Make up your own palletes or use palletes from the game style you want it to be close to, only if you're going for a specific style.

Now as for what you need to fix. It seems you're getting the wrong idea on Bomb Omb's feet. They appear below his body. Just by looking at the small sprite of a bomb omb you got around your credit tag, you can obviously see that.
And if you think about it, the whole aspect of his feet appearing in front of him wouldn't make sense at all. How the heck would it or anything else walk with something like that?
Hope this helps.