That depends on the code you use, if it is a bad code it may freeze, but a good code should cause no significant damage.
With the appropriate codes, an Action Replay can get you any Pokemon that exist in your game and its predecessors (For instance, in Emerald you could get all the Pokemon in Emerald and the games before it)
trade from another Pokemon emerald game.it is the only chance to obain another starter without action reply
Gameshark or action replay
You need an Action Replay for GBA or GBA SP. Stick your action replay in your Gameboy. Stick Pokemon Emerald in the action replay. Type i n the code.
You cannot get a action replay in Pokemon emerald its a thing you buy it is only used for a Nintendo DS.
You can get the code on google and type in Pokemon Emerald ation replay cheat codes.
You can get the one that says GBA for Pokemon emerald Action Replays and Just attach it to the top of of the GBA and Action replays ca give you cheats and glitches.
There is no legitimate cheat to get the Dragonscale item in Pokemon Emerald. You would have to hack the game with an action replay.
Yes.
by using an action replay
by using an action replay
by using an action replay