First, and probably foremost, is an all new beast, whose name I'm going to approximate as "Brakidios." Hopefully someone more skilled in Monster Hunter talk can come up with a better Romanization.

Brakidios is the cover monster for MHP3G, which means he'll probably appear on all the posters and on the game's cover. He's forehead and front legs have a special substance that explodes after a set time.

Plenty more details at the source link

Source: AndriaSang