Maybe if you take more or less care of it, it also depends on how you potty train it or the friendship bond is too strong/not strong enough for that character, which character do you want anyway? You need to be more specific.
Sorry in advance for not being on topic BUT I'd just like to say this chart that has been edited is a product of "chart theft" as I am the sole creator of this specific Tama-Go Character Chart which can be accessed here. I do not appreciate it because a lot of time and hard work was put into creating this chart. Please have respect for others' work.