Changing Battle Sprites?

P.S I'm a Dunce, how do you set an Avata.

if your referring to a zelaron avatar, then here's whatcha do:

go up to the top of this page where it says: User CP
Click on it.
then on the left side of the page there is a column and in it, it says "edit avatar"... click on it.
Lastly either upload your own image, or tpe in the url of one already on the internet. click save changes and your done!