What would be the best method of incorporating the classic Pokemon style battle using the interface system?

Im new to using interface system so Im not 100% sure how to get the information I want to show up and interact on a window that would pop up.
Use screen objects. Traditional interface elements are pisswash for using as HUDs and well, interfaces.

look into screen objects, screen_loc, and client.screen
Has been done before. Check out Falacy's Monster Kingdom, tho you need to put the icon paths back at their right place and the layer system has changed. Or at least how to ascribe a certain HUD element to a layer.