User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-21378804-20131003110715/@comment-16218874-20131003130201

What about uragaan?

He is cleary heavier than gravios.

Rust duramboros is hevier than gravios. Compare the damage each one does when falling above you. I vote for unkalos as the heviest though. Many belive that normal rath transforms into silver and gold. Specialy because when you kill a rathian in mh3 you get wyvern gold. That must be a clue.