One from Giovonni, and unlimited from the lottery and trade.
Nope.
it is impossible to get unlimited rare candy's with out action replay for game boy advance spgo to cheatcodes.com
there is a specific/special action replay coming out for that game in 2012 i believe...
Simply defeat another trainer.
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Yes you can trade leafgreen version Pokemon to another leafgreen version.
Action replay codes.
You can't.
it will turn off your game.
Not in Pokemon leafgreen only in Pokemon Firered never ever in Pokemon leafgreen And in Pokemon firered it is rare in power plant not available in Pokemon leafgreen?
By using a cheat code. TOTALLY against the cheat codes. The name of the code is I believe a game shark.