Though I can see youre truly quite talented as an artist, im not convinced that editing newly ingame items will do alot for your chances of getting them ingame.
But.. For the Sprites.
Pretty Good, Though as others have said, the first is better, and that it could do with just a little more to make it seem skull-like, the appearance of some teeth or the shell of where the nose was would help that.
Again, the first is much better.
Because it looks like a fang, the one issue I have with the ingame sprite (pretty as it is) is that it doesnt LOOK like a fang, whereas your first could easily have been ripped from a giant beasts gums, nice one.
Again, its a good sprite.
Personally though, its not quite the sprite that royal axe needs, and its a little... hmm... "cartoony".
The ingame sprite really needs changing (because it looks like a bat with a stick stuck so far where the sun dont shine, that it sticks out of its mouth...).
But really I think you need to go back to the start with this one.
I couldnt part with the old sprite, its just lovely <3 £>
Though your new sprite is good, it doesnt fit the bright sword for me, the bs should be upright, and doesnt REALLY need changing.
Ok, for some ADVICE.
If you want CIP to really (seriously) consider implementing your sprites, you need to pick items that are actually PAINFULLY UGLY ingame.
Since you seem so talented, how about attempting these ones for us all to see?
To my mind, these are sprites which are really painful, and could do with new sprites quite urgently.
You can do it