Once your family is in a house or location, pause the game, hold LB + LT
+ RB + RT, and it will say that Spoot is now available under "Decor
Miscellaneous". Place him on your lot, and all cheats  will become
available. Note: Using cheats will disable challenges and
achievements. However, you will be given the option to save your
neighborhood before enabling cheats so you can resume the game later
without cheats enabled.