You use the decoder in Poptropica by matching the red letter with the green letter for example if it says r=d, you get the green d and put it underneath the red r. If you don't get it just watch the walk through.
P.S Read File X vertically.
no
No, you can't use a high definition decoder to access free internet.
They are everywhere, use the metal detector to find a lot on the beach.
poptropicasecrets.com
u can unboerdthedoor
Defeat islands or purchase them
garfield
fuzzybunny
you can use the decoder in spy island. if you see some mysterious people, (normally in black) talk to them and they may give you a message.
the dwakel decoder searches tiny crystallized dragon's breath...you must get J6 secret hideout map and use the dwakel decoder to find hidden places..
you have to buy the invisibility card in the shoping menu
you can't