A noobs new Fakey-mon

[Toastfighter]

since my shading is obviously terrible, could someone show me how to shade/color it properly? maybe changing part of it thats so jaggy? I also removed the the Emerald (the thing on its chest) I just figured that I might as well use that eye color somewhere else and the chest seemed kinda bare. Im working on a edited version based on some of the advice. They also aren't supposed to actually be pokemon, but something new thats reminiscent of that style of game.

Also, can someone suggest a better program than freaking MS Paint?