i am intrigued by this Banpei/Skuld idea. i hope you do write it, ai!
my own spankable list...
Sakura from Sakura Wars! (the Naruto one definitely deserves it, and CCS is too cute not to spank, but there's very few SW pics, i think Su did 4 and Erika did a few, that's it)
Kim Possible. it IS one of her phrases, after all
Miaka from Fushigi Yuugi
LOTS of spankees from Maison Ikkoku: Akemi Rippongi, Ibuki Yagami; must find picture of Kyoko spanking the two kids Kentaro and Ikuko.
i can't believe no one has mentioned the greatest anime ever...and its oh so spankable redhead! Neon Genesis Evangelion's Asuka Langley Soryu!!!