How to create an NPC using RAthena's scripting:

map_name,x_cord,y_cord,npc_facing_direction -TAB- script -TAB- NPC Name#HiddenName -TAB- Sprite ID,{
   mes "[NPC Name]";
   mes "Hello World";
   close;
}


Common Script Commands: Script Command Documentation:
All the script commands in RAthena can be found here.

How to enable your NPC:
  1. Save it as a text file in your /npc/custom/ folder.
  2. Open /npc/scripts_custom.conf
  3. Add the following line:
    npc: npc/custom/name_of_your_text_file.txt
  4. Save and close.