(leaving this here to maybe work on later, or for people to comment on if they want)
I was looking at the FFI&II Kanzen Kōryaku-hen which lists all the enemies from both games and gives them numbers. More interestingly it groups enemies into families. These are listed below (FFI on left, FFII on right)
Points of note: Enemies that are palette-swaps of each other aren't always found in the same family. Undead variants will often be found in a group especially for undeads. If the enemy has "were" in front of its name then it will be considered a Beastman/Mutant. Crazy Horse gets classed as a beast while Nightmare is a demon, and one of the weirdest situations is that Dark Fighter is humanoid but Dark Wizard is Demon???
I don't know if we want to just simply use these as families, or if we want to use a "Genus" and "Class" system (a la XII), so we can have "Devil: Goblin".
Shouldn't be hard for us to categorise the Advance enemies. JBed (talk) 12:11, October 23, 2019 (UTC)