Not much really happens the only thing is you risk losing your saved file or in rare cases you find a bug or glitch in the game whilst using the Action Replay which could cause your game to corrupt...
you can't do that you need a action replay or R4 if you want cheats. or.... you could probably use the events to get legendaries.but i know you can't use cheats without a action replay
you could look up the cheats at cheats.com.
if you have the action replay it could show it if it does not show there are no cheats
I Guess you could buy Action Replay for D.S
The easiest way is to Google them, but you could probably buy them or something.
I only know how to put cheats with the new action replay first you go to thecode list menu on the game you want to the cheats on then select the cheats that you wanna put the cheats on then take out your action replay and put in the game then on the bottom screen there should be a red button that says start tap that button then u could play the game with the cheats that you selected. but they dont work on TTDS and R4DS
Note: Any cheats involving Animal Crossing could RUIN your DS. The action replay system is known to have problems and could potentially pass on a virus to the DS. Yes, there is cheats for Animal Crossing Wild World for the Nintendo DS...Although you need to buy a card called "Action Replay" This is the link to Action Replay (Europe) : http://uk.codejunkies.com/Products/NDS-Action-Replay---EURO__EF000144.aspx American: http://us.codejunkies.com/Products/NDS-Action-Replay---USA__EF000142.aspx
if you mean the code that allows the cheats for action replay to work mine is cpue-3811def6 sorry if it don't help much that's all i could come up with.
There is no proper way other then by an event which has already happened or you could use action replay or cheats to get one.
You could either trade for it or use cheats like action replay.
i think the only way is to evolve a gible that you can get at wayward cave secret passage or you could use action replay and steal cynthias but i don't us Action replay cheats so i don't no how though.
It isn't really a good idea to use an Action Replay for anything. It is like a game of risk. Some cheats could corrupt the save file and delete your game.