Nothing really, he just gives you a "Dig" TM.
go to the fossil maniacs house and talk to the little girl
ditto can only be caught in emerald after u have become the champion behind the fossil maniacs house ditto can be caought BUT ONLY ON EMERALD
You need to get to Fallarbor Town and go to the left. Then go to the fossil maniacs house and talk to the kid.
In Pokemon Ruby, Sapphire, and Emerald, the Fossil Maniac is in Fallarbor town. His house has a large hole on the inside. When you go through the hole, he is all the way in the back of his homeade cave. NOTE: You get dig in this house. Talk the the Fossil Maniac's son before going into the Fossil Maniac's cave.
the TM dig is found in the Pokemon maniacs house on route 15
I have both Sapphire and Emerald. His little brother is in the entrance off the cave within the house. The house can be found in route 114 to the left of Fallarbor Town. He will give you DIG. http://bulbapedia.bulbagarden.net/wiki/Route_114
You go to falobour town and find the fossill maniacs house ask the boy in the house beside the cave. If it dosent work its because i did that Pokemon emerald. GET IT.
The Claw fossil
TM28 Dig in Pokemon R/S is on Route 114 inside the Fossil Maniac's house.
That TM is given by a kid in the fossil maniac's house which is west from fallarbor town.
Anorith and Lileep.
In the dessert