Sorry.
the table with the options is in the folder data\lib\107-main tables.lua
The part of this script with the table is this:
diarias = {
Easy = {"Botamon", "Poyomon", "Yuramon", "Nyokimon", "Pichimon", "Pabumon", "Kuramon", "Kiimon", "Leafmon", "Pafumon", "Relemon", "Metal Koromon"...