I think, like the ideas I discussed in an old Fossil Club (old fossil, get it?) they should really expand this concept. Yes, it is quite weird the way they need a small stone to convulse into a full-fledged Pokémon, and this can be compared to the cloning concept in real life. The Pokémon world has a lot of unorthodox technology, let's admit... from small capsules containing gigantic creatures to boxes sending Pokéballs (containing Pokémon nonetheless) through various Pokémon Centres to reach the trainer. Comparing this with the revival of fossils, Wynaut? I feel that the Aura RHCP talked about could be the necessary item for revival. Think of the aura as a fingerprint, or DNA. An exclusive to each Pokémon. The driving force that compels them to be the magical creatures they are, could be a very good identification system. Heck, I'm sure all Lucario use this aura to locate their friends as well.
Yes, cloning is a very flawed art, and Dolly (that cute sheep that was cloned off) died of some uncommon disease, though her children lived very mediocre lives. All further attempts failed at most. Still, remember that the first fossil reviver was that Pokéflute player Dr. Fuji, and he loved Pokémon. I'm just clinging on to the technology in the Pokémon world.