User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-70.128.20.68-20130225220558/@comment-4813670-20130226121959

there are no intro for online monsters in Tri, except for elders.

This also applies to 3U, except that the Moga village (offline) now has high rank quests that include the Deviljho, which is the reason why he gets an intro video.