An unexpectedly great game - who would think that a Pokemon photography game would be fun?
So, what makes it fun?
You aren't just taking photos, you are also making Pokemon act a certain way, making them evolve by doing specific actions(sometimes through the entire level!), unlocking areas by interacting with the levels, all while having a sense of urgency because you are on a cart that is always moving ahead.
If you wish to complete the game and get pictures of every Pokemon (which you will want to do), you will have such a great time.