Info
The tl;dr part of this website...no, wait, that's not true. This section contains a lot of stuff, though, ranging from basic information about Volkner and Flint to in-depths about the dynamics of their relationship and pages for their game and anime appearances, along with some media galleries...to make it short, this is the core of this website and it's got all of the interesting, non-fanmade stuff.
General info
Basic (or not?) information about these guys and what they do.
Their relationship
A series of essays on their relationship and shared history from both the games and the anime. Of course, speculations abounds in here, so you know.
Game-wise
They appeared first in the games, so here it is: game information and media.
Anime-wise
Volkner and Flint appeared four times in the anime, but they'd need their own spinoff series.
Please note that, unless specified otherwise, all information was written with the original Japanese episodes in mind.