I'm not sure the de-fossilization machine would be allowed, since in the games a scientist takes it and does stuff to it, asks you to come back later. With that in mind we're not sure exactly they do to the fossil to revive it, so a machine would go against game-canon, because scientists revive them.
Here's a blurb from Bulba...
" However, due to the fact that the Fossil Pokémon is resurrected into the preserved corpse of the prehistoric Pokémon, the living Pokémon regenerated from the Fossil is not exactly the same as the Pokémon it was in the previous life since the process of reviving a Fossil Pokémon is actually done by extracting the broken genes from the Fossil and rebuilding them to recreate the missing parts that were decomposed before installing them onto the skeleton of the dead Pokémon. This may also imply that the revived Pokémon probably has no recollection of its past life."
With the blurb in mind, I'm not sure if it's possible for them to have any past recollections, and since it isn't the same body there might be a few differences from what they looked like in the past.
It's up for the admins to make the final decision though, lol.