Dogz (Game Boy Advance, 2005)

I recommend this game to dog-loving GBA players everywhere. The point of this game is to raise your puppy for 3 weeks. After this, you unlock "Always Together Mode" which is a puppy free play. In the normal mode however, your job is to take care of and train your puppy. In the beginning, you choose what kind of dog you would like: Its gender (boy or girl), demeanor (energetic or relaxed), and its size (small or large). Then you watch a small cutscene and pick your puppy. If you don't like the breeds in the first shop, you can continuously switch between pet shops. After that, you can train your puppy any way you please. In "Always Together Mode", you can do what you want when you want. No events take place, no one is there to talk to, just you and your puppy. Everything is unlocked as well. However in this mode, you can't take walks.
The_Pokeson