hi, your program looks nice, though as Jxx said already, it's kinda useless if you can use a webpage.
but if you're going to keep your programm, pls do one thing:
show the results like this:
HP
Att
Def
...
instead of: hp att def
and maybe you could change sliders in WPF to have it looking as pretty as veekun-iv-calculator
EDIT: Including Pokedex seems so wrong in my eyes. This should be done ingame.