You can't just put cheats into the game. The game developers are the only ones that can. They do it when the game has not been released yet. There are many questions on WikiAnswers about cheats for Nintendogs, but honestly, none exist.
Yes there are. Search Nintendogs cheats in Google - easiest way!
none
go to google and find it "cheats"
no there are not any cheats I know you might find some unlockables at www.gamewinners.com CHECK IT OUT !
The producers of Nintendogs have not made any cheats for any Nitendog game wow typos much?! anyway work your butt off, lazy, theres no cheats
there is none!
http://cheats.gamespy.com/nintendo-ds-cheats/n.html I don't know which version you have but scroll down and pick one.
yes there are some
get atleast 2500 points
I do !!! but I am not telling cause i forgot them LOL
Play lots of tournaments and walk. Or you can always use cheats.
Yes there is go on codejunkies.com click codes/cheats and write nintendogs, press lab and friends and it will tell you all the cheat for the game.