Yama Tsukami

Yamatsukami is one of the oldest ancient creatures known to hunters. It's skin is covered by Dragonmoss & it has tentacles & a pair of whiskers.It gives out Dragonwoods on rewards,although the location of the dragonwood in Yamatsukami's body is yet to be known. When enraged, it's red eyes glows yellow. Its classification as an Elder Dragon is simply due to the fact that it does not fit into any category, much like the Kirin. This mysterious creature's place in relation to other monsters is completely unknown. Although a tremendous size, it is able to constantly stay up in the air with no support. Its attacks are slow but devastating.

They seem to have a symbiotic relationship with Great Thunderbugs, which lets them rest inside Yamatsukami's body until they mature & assist them by attacking their hunters. These Thunderbugs can explode when it is near a hunter, causing a good amount of damage to its target.

Trivia

 * Although it was never alive there, Yamatsukami first appeared in Monster Hunter 2 as the final boss. Although it wasn't included in Monster Hunter Freedom 2, he was added in the expansion game Monster Hunter Portable 2nd G as the HR8-HR9 Urgent quest.
 * It will make its first U.S. appearance in the upcoming title Monster Hunter Freedom Unite.
 * Although Yamatsukami cannot be captured, the tranquilizer effect of the tranq bombs actually numbs it from flight and dropping him down (In addition, it drops a shiny).
 * To take advantage of Yamatsukami's Tranquilizer weakness, throw 2 tranq bombs while it attacks with a Wind Tunnel (be careful, it is risky if you don't move out).
 * This requires 1 more tranq bomb for each additional time you want to tranq him. 3 tranqs/first time; 4 tranqs/2nd time; etc.
 * Its Great Thunderbugs are also known to explode.

Gameplay footage
http://www.youtube.com/watch?v=0HUd8gW9iWo