you can't
Sorry You Cant :(
press the shirt on poptropica and then before u press on Mordred press the shirt and then u can put it on
you don't inless you buy it
To get the Shark Costume in Shark Island Poptropica you must click on the shirt icon in the corner of your screen, click on it, and then click on the man with the shark suit on.
You can get a costume by coustimizing another player by clicking the green shirt, then clicking the person. Another way is to go to the poptropica store and use purchased or earned credits to buy costumes.
first u go to superpower island and find a fairy girl and click the green t-shirt and get the costume
the best way i know is to get a green backpack from a trooper.get an austronaut helmet get a knight sword and yellow hair and a blue shirt.
you press d
a costume front is the top of the costume/the shirt.
You have to go to Astro Knights island and go past the plantarium and theres a sign with a random costume on it. If you click on it you can get that costume or you hit cancel and look at other costumes that you can get. But you have to have credits to get them. You get 100 credits every time you finish an island, and all the costumes are 75 credits.
you push the custemizer button the t-shirt
theres a costume