The Helix Fossil, as well as the Dome Fossil, do not appear in Pokemon Emerald, Ruby, or Sapphire. The only two fossils obtainable in Emerald are the Root and Claw Fossil, which can be found in the desert in Route 111 (for Emerald, they are at the top of the Mirage Tower which appears and disappears frequently in the Desert), and you can only pick one of the two.
The helix fossile is not in the Metalle Serie, I'm afraid.
Root Fossil Claw Fossil Helix Fossil Dome Fossil Old Amber Armor Fossil Skull Fossil Rare Bone
In the desert and in mirage tower.
the fossil maniacs brother
U get it from the fossil maniac
crush all the rocks on ruins of alph until you find a helix fossil
get the root fossil in the mirage building in the desert
if u want to no how to find a helix fossil it it is around the right part of cave
In the first cave I think, you can either choose the Dome or Helix Fossil from the one guy you beat who finds them.
You can catch all Pokemon in Pokemon emerald(including both fossils, go into the fossil maniacs house into the tunnel at fallarbor where you can find ditto wismur loudred and the other fossil after you've finished the game) except medicham, meditite, zangoose, two of the starter pokemon, etc.....
In Pokemon Emerald, the fossil maniac can be found in a house outside of Fallarbor Town. I'm not exactly sure when (Possibly after you get the fossil out of Mirrage Tower), he will not be in front of the hole in his house. Enter the hole, and you can find the other fossil, plus the cave has ditto in it, an excellent bonus. You can get there after you beat the elite 4
I can only find one fossil, defeat the Elite four then go to the fossil maniac and go in the cave, you will find Dittos in the far right you will find a fossil Your cheater, Shadow (the Hedgehog)