I did it. The updated method will be released somewhat soon--let me do everything legit this time. On the successful Nei resurrection that my screenshots come from, I had sold everyone but Nei's equipment to get the money for both Polymetryls, and ran from more or less every battle until I could buy tons of Trimates and Covert Ocarinas. But Chi was right--the missing link is keeping Rudger on the party at all times until you get the Silver Bullet Necklace. I also want to see if I can remove some steps I had added.
I've just finished the first legitimate run of Roron. I need to make about two Laser Shields to sell so I can buy both Polymetryls when time comes.
Edit 1 -
https://www.mediafire.com/?mdbifa6pe1bib4mhttp://pastebin.com/qXS1g8zAThis is it. This is the definitive way to resurrect Nei.
Edit 2 - I did want to say that all thanks should go to Chi, and not me, for having diligently tested over twelve playthroughs of Phantasy Star Generation:2 up until AMeDAS to discover the exact requirements of reviving Nei. So while I did do some legwork to make the FAQ typo-free and removed some unnecessary steps, (Like talking to everyone in town when in fact only a few people's text had updated.) Chi is the one who deserves all of the praise. Thank you so much, Chi.
Edit 3 - Rather than post something else below, I'm just going to quote Zzasikar for directions on the Animal Claw, since I'm still working on Uzo Island in my legitimate playthrough.
Zzasikar wrote:In regards to the Animal Claw: It is available from the southeasternmost room in Skure B3F from one of the muskcats. I believe that if you have fulfilled the conditions for reviving Nei you should also have no problem obtaining the claw. As I found mentioned on a random forum in a post I probably couldn't find again, you do need Rudger/Rudo in your party in order to trigger the dialogue. Something I did not find mentioned elsewhere, however, is that you need the Magic (NOT Mogic) Hat equipped in order for the cat to give you the correct response. It's a minor thing, but it had me scratching my head for a moment or two.
Once you've got Rudger/Rudo and Nei both alive in your party, the Silver Bullet Necklace in your inventory and the correct cap equipped, you can just walk up to the muskcat (there are two, so try both) and talk to it to start the short event.
Also known as vivify93.