The latest Sims 4 Game Patch has added a new way to change your Sim’s traits without using any cheats. The “Re-Traiting Potion” found in the Aspiration Rewards Store costs a whopping 5,000 satisfaction points, and is placed in a Sim’s inventory when purchased.
When Sims drink this potion, a special pop up box appears allowing you to change one or all of a Sim’s traits. This potion only works on the target Sim, so you will have to purchase multiple potions to change the traits of other Sims in your household.