The guy who gifts the fossils has dissapeared, is there anyway to get him back or any ideas to where he might have went?
You may go there the other way, there are one in Winter (the one you originaly used to reach Icirrus) and one in other season (one to the "south")
You get no fossils in Twist Mountain. You get fossils in the Relic Castle in the Desert Resort. Hope this helps...
EDIT-the reason why he isn't there is because it is Winter in the game making him dissapear. You have to wait 1 month to get him back.