There are about 10 levels in the game each with different challenges. sometimes you have to go back a level to get new pokemon that you can only see with flutes or when you throw an apple.
If you have not played this game you might think it sounds easy but it actually is not. Sometimes you need to lure a pokemon to get a picute of it. with others you have to use a poke flute, you have to be quick or else you will miss the desired pokemon and yo'l have to try again. little things like that add to the replay value of the game.
Over all this is a unique game with beutiful graphics. no multiplayer means it won't be every body's favorite. but if you are a diehard pokemon fan pick this one up.