Are there any missable/limited recruitable monsters?
As far as i am aware there are no monsters you can miss in the sense of never being able to get them after a certain plot event.
There are 10 monsters that you can only get once. The first 3 you get by fighting. The other 7 by getting their crystal with improved Moogle throw. Here's the list:
- Gigantuar.
- Twilight Odin
- Golden Chocobo
- Nanochu
- Chichu
- Silver Chocobo
- Leyak
- Rangda
- Cactuarama
- Cactuarina