Not the best game, but worth getting if you want Manaphy in Diamond and Pearl.

User Rating: 9 | Pokemon Ranger DS
Pokémon Ranger is a wholly unique game. It may be pretty uneven in difficulty, but it does tend to grow on you. The concept behind it (drawing circles to catch Pokémon) is fairly different, and there are lots of creatures to catch.
The difficulty, though, is pretty uneven. The game is pretty easy until you get to some of the "boss" Pokémon (like Steelix, Charizard, and Entei), and the game then becomes terribly difficult. Still, I liked to see that the game gave me a challenge, something a lot of other games don't do.
In all, this game is pretty good, but nothing spectacular. HOWEVER, if you want Diamond and Pearl, get this game. A secret unlockable mission on this game is the only way to get Manaphy, one of the new Pokémon, on Diamond and Pearl. Even if you don't want Diamond and Pearl, you might like this game.