User blog comment:Kogath/Monster Hunter Generations Discussion/@comment-26034899-20161005224225/@comment-7584137-20161006083147

That sounds like just an "Urban Legend of Zelda" to me as well. Lore-wise, Glavenus probably could kill Deviljho, yeah (in fact, I´d say it is one of the few threats the big green fellow has to actually worry about. That tail would do some serious damage). But we all know that a lot of the stuff in the lore is never seen in the games. Or else wearing Fatalis armor would eventually end up possessing you.

Monsters can be described as enemies lore-wise, but in the game they will always ignore each other and focus their attacks on you. As awesome as an actual fighting system and/or animations would be, they are, indeed, not present in the game.