I think this trope needs to be renamed - people seem to not be getting the point of the trope and half the examples are bad/false friends rather than that one evil yet loyal friend.
Hide / Show RepliesThat's one going to be a hard sell with the 1600+ inbounds.
"For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled." - Richard FeynmanI don't think I would say this character is necessarily a cynic. The Misa example, for instance.
I don't think Vimes and Vetinari are examples. For one they aren't friends, Vetinari is Vimes's boss, and Vetinari doesn't really display any of the characteristics of this trope.
None of the examples under "Western Animation" seem to fit this trope; while I'm not entirely familiar with the series in question, they seem to be describing bad friends, rather than loyal evil friends.
Per TRS, this is going to be a disambiguation page:
https://tvtropes.org/pmwiki/posts.php?discussion=16653299340.13192300&page=2#comment-26
Patiently awaiting the release of Paper Luigi and the Marvelous Compass.