you need to add the mobs you want on the map then you edit the mob drops in the mob_db (do not edit mobs that used in another map lik poring etc the mob edit will be on a monster not a map)
or you would need a script to make the items to the char after killing a monster on a map
ether ways you would need to add mob spawn to the map
like so
prontera,0,0,0,0 monster Poring 1002,70,0,0,0
this will spawn 70 poring in prontera
this added out side a npc script not inside