An actionreplay is a cheating devise that lets you put cheats like "99masterballs" on the game. Hoped this helped :)
Update,add the game ID to the actionreplay.
buy it on ebay
yes
how do you get the 999 masterball cheat for Pokemon platinum actionreplay
gameshark actionreplay
codejunkies
try Gamefaq.com
There is no such thing as a Mewthree.
use the Pokemon modifier
You need a Gameshark or Actionreplay
You can't
get cheats on a actionreplay.