Interesting. While I’m tempted to say me (as I’m a bit of an expert in extinct pokémon, among other things, and yes, I have an analyzer), it would likely be more professional for me to say take it to your regional fossil expert. You’ll likely need to do research to figure out who this would be and where you might find them. Usually, you’ll have the best luck if you look into who offers fossil restoration services, although in some regions, this might be difficult. Hoenn’s fossil expert is a scientist with Devon Co, for example, and thus, he’s not exactly at liberty to work outside of Devon’s labs for security reasons unless you happen to be Ruby or Sapphire. Alola’s fossil expert, meanwhile … literally lives in a trailer somewhere in the vicinity of Lush Jungle, and thus he’s a bit difficult to find in the first place.
Most of the others are associated with museums or laboratories that are a little more open to the public than Devon, so it should be easier to find someone who can help you.
Best of luck!
(As a final note, if you get this fossil restored, would you mind sending images? I’m quite interested in learning more about what this might be!)

