Not sure but I know you can get one from one of the titan trial missions. Anyway i don't mean to hijack your thread but on the topic, I've been meaning to ask, does the doctor's code upgrade into anything? I'm working on my treasure hunter trophy but I've sold all mine...
If you had told me 6 years ago that I could play Final Fantasy 8 and Spyro the Dragon on the toilet, I'd have said you were mad. And then God gave us the PSP.
No, as far as I know you can't buy them from shops, and there are only 3 in the games from treasure chests. I think the developers purposely limit the number of Doctor's Codes so the players won't breeze through the entirety of the game by using Elixirs.
1 from chapter 2 boss. 1 in a chest in chapter 6. 1 from completing M41.
1 additional elixir found in chapter 13.
Possible of 4 elixirs total in the entire game. It does not upgrade into anything but star level, which does not have any added benefits. Must be dismantled while in star level in order to obtain the elixir though.