I need help with some pokemon fire red cheat codes?

So I'm playing FIRE RED on a DS Lite. Are there any cheat codes to get infinate rare candies/master balls, similar to the missingno cheats from the original games? Do I have to get a "gameshark"? I'm sick of running around trying to find random people and pokemon to slowly advance my levels..

i'm pretty much only used to the original Gameboy Color version, so try and dumb the process down as best you can..lol

thanks!