there is no shch thing as a tamagotchi v3 or v4 nomater what people say they are not out yet.
Also you can not train your pets to be toilet trained no matter how many times you make it go on the toilet
it will never be toiet trained.
srry to tell you but there is no way to make shure you get a cirten tama.
you cant treat your tama bad to get a bad one or treat him good to get a good one
Costume
use the code once and get a free costume agein pay 2500 points and get a stuffed animal
this your pet can wear to but the stuffed animal costume is a one time use