User blog comment:Lord Loss/Monster Hunter Frontier G 2 Discussion/@comment-1011548-20130913160802/@comment-4009941-20130915041709

SIlver has a sort of HC version just like Gold Ian they were one of the first to be revamped into what we now know as Specific Individuals and HC monsters http://monsterhunter.wikia.com/wiki/File:Silver_Los_3.jpg and Giadrome is not in frontier.

Its just recently that Gold Ian gets a official HC version instead of just a Specific Individual revamp and to be more clear that means we had a Gold Ian with the same looks and moves of HC Rathian mostly for some years and the first revamps were SIlver Los, Gold Ian and Diablos oddly Diablos got his own HC version while the others didn't.

But anyway continue the list: Purple Gypceros, Lunastra, all 3 Fatalis, Abiorugu and all the G-rank exclusive monsters.

Its hard to say if Goru and Aru count as HC or not but in a way they do since HC weapons count there quest as HC and you need SR to go on the quest.