Animal Crossing: Wild World or Profesror Layton?

Both are great games and some of the best on the DS.

Professor Layton may be more of a challenge and will keep you playing for the story line. Has an actual story more than Animal Crossing.

Get Animal Crossing if you want a casual game that you can play once a day. Basically all you will be doing in this game is collecting items, talking to villagers, fishing, catching bugs. Typical everyday things. Good to get if you have friends with it as well.

Whatever one is cheaper is always a good deal. Cause they are both great, but it depends on what you want in a game and how long you think you will keep playing it. Animal Crossing requires a fair amount of time for the rest of your life.

Hope I helped

Professer Layton.