Very descriptive.

Seriously, what kind of graphics? Explain and maybe somebody will help you.

What kind in particular?
Flames? Thunders? Hitsparks? What?

If it isn't too fancy you could use this for the hadouken: http://spritedatabase.net/file/8718
ripped by @ShinZankuro:

but maybe they clash with these effects: http://mugenguild.com/forum/topics/cartoon-style-fireballs-156335.0.html
(you'll find Cartoonish fireballs, thunders, hitsparks, smokes etc.)

http://www.themysticalforestzone.com/
If you want custom sparks or FX from various games, this is where you can get them Also, there're many other sites where you can get sprites, like here:
http://spritedatabase.net/affiliate