Hmm, all I could remember and find are those:
(http://www.sprites-inc.co.uk/files/X/X1/Wep/mmx1-w-rollingshield.gif)
(http://www.spriters-resource.com/resources/sheets/7/7153.png)
(http://www.spriters-resource.com/resources/sheets/24/26305.png)
Though they are small.
You can try to use this one:
(http://www.spriters-resource.com/resources/sheets/16/16783.png)
make transparent sphere with sparks, or something... :-??
Not much, yeh? :|