It took far longer than it should have to search for it on the internet, but I managed to find the Spy vs Spy cameo from Hanna-Barbera's mid-1980's MAD animated special. The entire feature was never realeased to the public, but a small portion of it has been uploaded to youtube.
I dunno why, but I can kinda see White Spy as being rather vain for some reason (or that's at least another headcanon personality I am giving him that isn't really official, alongside me headcanoning him as being a pompous, sassy perfectionist).
Look'n handsome there, White. Look'n REAL handsome.
(Here's the original comic version that was released about a decade or so before the animated adaption from MADtv):
I have to imagine that White's fairly vain demeanor is also something Black usually exploits at every given opportunity via his pranks. I mean, I can definitely see Black as being quite a bit of a prankster. Here's another comic (which was never made into an animated adaption for MADtv nor CN's MAD; I wish they did for the former); however, White's more overdramatic as he falls for a rather obvious prank and his vanity is pretty much downplayed this time, I guess:
As much as I admire how much of a prankster Black tends to be, but poor White. The dude basically had a heart attack right then and there because of such a twisted prank Black just pulled on him. Wow, Black. Just, wow.
I do not claim ownership of any content. Spy vs. Spy belongs to the defunct MAD Magazine and the late, great Antonio Prohias.