Well, adoration points unlocks dogs, and this cheat shows you hot to get them. While you are brushing your dogs, you get 1 adoration point per minute, so, if you leave your ds on the charger, on the brush screen, overnight, you could unlock a dog or 2.
This is another way to get dogs, but you need someone with a game that you have never connected to (eg. if i have duchand and friends, and i have connected to my friend with his dalmation and friends, it will not work with dalmation and friends anymore, unless you start a new file)What you must do, is get your friend to send you a dog that is not in your kennel on bark mode, and then, when you go back home, that dog will be unlocked. Hope ypu find this helpful, ill put more on later!!!! (P.S. with the second cheat, if u send a dog that your friend doesnt have, and yor friend sends a dog taht u dont have, u will both unlock those dogs)(and these cheats work on any version i think, not sure about Best Friends, but u can try)