Only few cheats work in Sims Life Stories, and even if you enter some from the Sims 2, they won't work. (goodbye sim modder, I will miss you.
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Here is a list of cheats that work fine:
CHEATS
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Warning: Not all cheats are stable and can destroy your current game. If you heavily use cheats eventually your saved game can become corrupted and you will have to delete the saved game. The Sims Life Stories is designed for the casual and new player, so try the game without cheats.
To enter cheats in The Sims (TM) Life Stories, first open the command console by simultaneously pressing
ctrl-shift-c. Note that cheats are case-sensitive. Some of the cheats that can be used here are as follows:
help: lists all the cheats in the game.
help [cheatname]: displays specific information about the cheat.
exit: closes the cheat window.
expand: expands or contracts the cheat window.
moveObjects on/off: removes footprint limitation for all object placement in Buy Mode and Build Mode. Removes limitations placed on hand tool for when objects are in use, or are normally non-movable objects. Is known to cause issues with game elements, routing, hidden object generation and manipulation, etc. Note that using this cheat allows you to delete objects that normally cannot be deleted, such as Sims, the mailbox, and the garbage can. If you delete these objects, there is no way to get them back, so be careful!
aging –on/off: prevents Sims from aging. This can disrupt the carefully tuned gameplay balance, and will prevent little Johnny from ever growing up, so treat this cheat with care as well.
autoPatch -on/off: This cheat lets you re-enable notifications when there is a game update available for The Sims (TM) Life Stories. Just turn Autopatch on and go to the Custom Content Browser (the little snowflake button on the UCP in the neighborhood). If there’s an update available you’ll be asked whether you want to download it.
slowMotion [value]: The slowMotion cheat takes one parameter: the "slowness" setting (such as slowMotion 4). This value ranges from 0 to 8 where 0 is normal speed and 8 is the slowest speed.
boolProp enablePostProcessing true/false: enables the use of postprocessing cheats (see below). Please note that you must have a video card that can handle pixel shaders in order to successfully use this cheat. If you use the cheats and you don’t have pixel shaders, the screen will most likely go partially dark, and will not come back until you turn off enablePostProcessing. If you turn on postprocessing, and you turn on cinematics, and a cinematic plays, you may also experience unwanted graphical glitches.
bloom [r g b x] (rgb is color) (x is the bloom amount) [0.0 - 1.0]: This cheat adds a blur effect, like a sitcom flashback moment. Must have entered boolProp enablePostProcessing true for this cheat to work.
vignette [centerX centerY X] (X is the vignetteing factor) [0.0 - 1.0]: Adds a blur effect from the specified center. Using "vignette 0.5 0.5 0.5" should put some blurry bits at the edge of the screen. Vignette 0.5 0.5 1.0 is maximum edge blurryness. Must have entered boolProp enablePostProcessing true for this cheat to work.
filmGrain [val] [0.0-1.0]: This cheat makes the screen grainy. Must have entered boolProp enablePostProcessing true for this cheat to work.
letterBox [val] [0.0-0.4]: Adds a letterbox effect to the view. Must have entered boolProp enablePostProcessing true for this cheat to work.
motherlode: Adds 50,000 simoleans to your family's funds.
kaching: Adds 1,000 simoleans to your family's funds.
they did it to avoid messing up the story plan. You can only use it in free play.