Tombstone of Life and Death

$$ The Tombstone of Life and Death is a debugging object in The Sims 2 that can be summoned with the testingcheatsenabled cheat.

The Tombstone of Life and Death can be used to add any Sims that exist in the current neighborhood (including NPCs and dead Sims) to the household, impregnate a Sim with any other Sim on the lot, spawn a randomized Sim into the household, or speed up the aging process of a Sim.

The Tombstone of Life and Death is only available in The Sims 2.

Sims from other households and townies
Sims that have aged on another lot that are added to the current household with the Tombstone will have their age reset to 0. For example, if Angela Pleasant is added to a household, and is 5 days from becoming an adult. Her age meter will be reset back to the default 15 days, as if she had just transitioned from a child.

NPCs
Whilst the Tombstone allows several NPCs to be added to the household, most of them (such as the Social Bunnies and Santa Klaus) dissapear as soon as they appear and cannot be easily removed from the family. Some NPCs can potentially corrupt a household if added to the family.

Three options avaliable underneath the Add Sim to the Family option, named NPC: Remote Controlled Car, NPC: Bird and NPC: Robot do not even appear in the household if selected. The three Sims appear as female Sims with no face and long black hair wearing a red long-sleeved top and white jeans in the household picture.

Dead Sims
If the player tries to add a dead Sim to a household with the Tombstone, the Sim will fade and a message saying "[Sim Name] has died on another lot. [Sim Name] will appear as a spirit in the place of [Sim Name]'s death".

Impregnating a Sim with another Sim (including NPCs)
If the option Get Pregnant with... is opened, it is possible to select and impregnate the active Sim with any other Sims on the lot (including ghosts and NPCs). This method is popularly used to create Sims whom are children of the Grim Reaper and is one of the few ways outside of mods that allows a Sim to become pregnant with NPCs.