first of all get a pet which u like to adopt to stay in your apartment, dress it up with a hat/collar/ribbon, now go to the menu,click the disc nd cick options, click unlockables type : adopapet then type i24xla34, type cashx1000 then type (NAME OF PET)(HAT/COLLAR/RIBB ON)

now take care of the pet until its stamina is full and dont remove its hat/co9llar/ribbon until its owner comes and says "excuse me, but somethings come up, see i just went to a doctor and found out i have a pet allergy, so i cant claim my pet from you anymore, ill just take it to the pound(pet goes to ____) and says on second thought, i think my pet really likes staying with you, but i need some money to buy furless pets, ill sell my pet to you for 1000 simoleons" then coz of the cashx1000 you get that but u need to have the ff codes(dont change the clock coz the codes wont work)