As of Elona version 1.16 reloaded, it is possible to create custom NPCs for insertion into a game of Elona and into the current map via the wizard mode). This requires the user to choose an appropriately sized sprite and a text file of the format shown by the example of npc_template.txt in the Elona user folder.menu (thus, this cannot be done in
If you use a monster ball in capturing a custom NPC, you will gain a monster ball(user). The specification of which custom NPC captured is not saved, so when the ball is used, it will pick a custom NPC that you've imported/made randomly, rather than summoning the exact NPC you captured.
Dominating custom NPCs will properly add that NPC to your party.