If you have it there should be an icon saying codes on the right
Enter the codes in correctly... oK!
You enter them on Action Replay, then activate them.
memorise the code
get it with a game shark
put the codes in your ar. then select codes to be used. start game. press buttons that activate the code.
select "add new code" at the top of the code list and enter the code, after naming it.
Then I guess it's time to get a new AR
with an ar(action replay) wich you could buy at gamestop
you have to have the action replay for ds\dsi. you get the action replay at walmart\gamestop and more places
you need an action replay device they sell at wall mart for about 2o bucks
yes
AR codes work by manually putting a code on or download it(depending which AR you have)