I don't know how to for Pokemon game boy games. but for ds cartridges you will have to get either action replay or R4.
you can enter codes for those Pokemon by buying an action replay cartridge for Nintendo ds. { can be found at EB Games, GameStop Ebay.com and other places.}
u cant its only on gba games sori
You usually cant because you enter codes in Pokemon mystery dungeons its called Wondermail.
You enter it on the main menu.
By using action replay. Get one off ebay. EZ is the best
by entering cheat codes
There is no place to enter codes unless you buy an action replay for the DS which you can get for about 30$ at future shop / EB Games. ENJOY!
by going on the menu and go to options and here you will have enter codes option!
Enter the codes in correctly... oK!
Spearow: 721r6934
You must have a cheating device to enter codes for any game.
Basically you need a Action Replay for a Nintendo DS/DSi and then you enter codes which causes glitches in the games and helps you win the game.