Here's what I mean. It seems that in discussions involving the games and protagonists, this game always seems to get the shaft. Even "Chinatown Wars" gets mentioned in those discussions, so it isn't like portable titles don't get discussed because even LCS and VCS get mentioned, though it could be argued because they were ported to the PS2.
The thing about this game is that there are discussions about protagonists and Mike gets no mention once. This game probably is canon to the 3D universe as Asuka and 8-Ball appear in the game. King Courtney also plays a role, not to mention is actually seen. But then again, it's possible that this game may have gotten the treatment that "MGS: Ghost Babel" did as that one isn't considered to be part of the "Metal Gear" canon.
I have never actually played this game, but I have watched the entire walkthrough on YouTube.