become friends with username cattycat and she has the cat outfit
You are supposed to go to the Poptropica Store and buy the whiskers.
If in Spy Island, nothing!
no there is not there is a curlly one but no swirl outfit
That is kinda stupid.
In the poptropica store
You costumize her.
The black cat on Spy Island is just decorative and not part of the game. The gray cat, Whiskers, on 24 carrot island, can get you a crowbar. (see related question)
if you are an member you can get a different outfit from your closet but if not find somebody and copy their outfit
It pretty much matters if the outfit combo you get is rare or not. But for me, a spy island outfit is pretty cool.
go in the porter's closet
Unless you use the Costumizer on an existing outfit, the only way would be to search through all the character appearance items using CTRL+SHIFT+R (randomizer). *There are dog, mouse, and lion costumes for sale in the Poptropica store. The cat suit on Poptropica is when you go into Early Poptropica and you win the games in the arcade. But you also have to have 4 gold stars. Watch for the costumes and faces around Halloween.
There is currently no exchange or return procedure at Poptropica.