I found the way to customize these 2 unique NPC.Note: It's a new game, the default Grim Reaper and Pollination are not created by game yet.
Make sure to remove them before creating your own unique NPC
- Create a non played household and move them in a lot
- Send one of your played sims visit this household, the NPC must be here
- Show the cheat box : Ctrl Shift C
- Type : testingcheats on
- Get the ID of the NPC you want to set as Grim Reaper or Pollinator : sims.get_sim_id_by_name [First name] [Last name]
- Assign the NPC career :
- Grim Reaper : careers.add_career career_Adult_NPC_GrimReaper [ID]
- Pollinator careers.add_career career_Adult_NPC_Pollinator [ID]
- Assign the NPC trait :
- Grim Reaper : traits.equip_trait isGrimReaper [ID]
- Pollinator : traits.equip_trait isAlienPollinator [ID]
- (Optional) You can check if these parameters are added by using this mod :
Note: if you play this unique NPC, they will be fired and a new pollinator will be created by the game.