Animal crossing wild world HELP!

[ichigocat]

I just got my action replay and it works fine on my other games but in animal crossing nothing seems to work i select the Mortage only 1 bell and then put the game in but nothing happens...
exept flowers are beginning to grow on stones o.o

[PokemonLover TM]

Make sure that if you need a master code, that you have one. that might help

[ichigocat]

what is a master code?