Currently there is no such device. But there is a very high possibility that someone will make one some time.
You may what to find out about that elsewhere, not many people on this site tend to answer questions like that.
That is the correct spelling of "duplicating" (copying, repeating).
Portable devices are not yet officially supported, due to RuneScape requiring the use of Java. However, there are plans for RuneScape to become tablet/mobile device compatible with the planned release of HTML5. You can preview this technology in use on the Bestiary beta.
No, there are no cheats for RuneScape.
No. RuneScape 2 doesn't have any cheats of any kind.
YES, duplicating Pokemon and items, going to moon etc
No. RuneScape has no cheats.
There are not really any cheats for runescape but there are some glitches.
because it is a link to the runescape website
There aren't any programs that you can download, or any sites that will give you free Runescape gold.
Asking this is against the Runescape rules.
No, the code in the game also prevents this, there is none for Runescape.