yes i posted the same question months back. a FAQ guide or list of the best monsters/evolutions/stat growth/max stats is badly needed for this game, and does not exist on the web to my knowledge. think pokemon style index, to help with training these lufia monsters. also there are 200? monsters in the game, yet you can only hold 16 in monster keepers center? aside from evolving/levelling them (takes a long time), you can also pump up their stats with ores found in the ancient caves. unfortunately monsters won't take any sources (power/speed/life). i guess if you want to store and raise more lufia monsters you need to get another cartridge.
"great armies do not exist for peace. they exist solely for triumphant exertion in war." -AH