i heard that you have to go to the park and meet the cat Barney in the beach costume and become friends with it.
Some codes are:GayfunDgsrckhavfunthirstspacecctstwosecretFor more codes visit the Related Link.
The codes are havfun thirst gallon furpal funpal hellit lots of these unlock the same things
egyption mue and the code is; ctzluv
get rank C or higher on the optical course in the park
Go to the park and meet different cats. I know of one named Sasha. To reset cats in the park, give your cat a shower. Trust me it works.