Here's a tip from "Tip Master Vinny": Don't revive your Helix Fossil, unless you have 2 of it...
And when you reach Spinel Town, SAVE BEFORE HANDING THE FOSSIL TO THE GUY THAT REVIVES IT... For some reason, fossils die sometimes, so yeah...
Also: You, YOU! You got a claw fossil? I've trying to find that thing since forever sgfsgususu! *Sigh*