What is action replay because I don't know what it is!
PS:where is the underground too?
RabbitMabbit223.
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An Action Replay, or AR, as some call it, is a device used for altering a games code and therefore cheating at a game by getting various abilities, such as invincability, infinite life, infinite money, etc. In Pokemon games, it is used to get Pokemon that normally wouldn't be in the game, such as Darkrai and Shaymin in Diamond and Pearl.
The Underground is accessable by digging with the Explorer's Kit, which is an item obtainable in-game.
An Action Replay is a cheating device that so many people use because they can't do anything by themselves. It has a chance of ruining your game, so I highly suggest you don't buy AND use one.
The Underground (AKA Sinnoh Underground) is a place where you can dig up some treasures, traps, and bury spheres. You can also make your Secret Base here by using a Dig Drill in the wall. But anyways, getting to the Underground is simple. Just use an Explorer Kit (obtained in Eterna City) ANYWHERE outside a cave or building. You'll be transported to the Sinnoh Underground.
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