Why you should get this game if you like Pokemon:

User Rating: 9 | Dragon Quest Monsters: Joker DS
The good:
Many monsters to collect, an over-the-shoulder perspective adds immersivenes to the experience, ability to 'mash' two monsters into a third one increases the possibilities.

The Bad:
Can only save at predesignated save-point locations. Battles don't allow you to skip the attack sequence graphics, forcing you to sit through the same hits over and over and over.

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Most of the reviews found here and elsewhere are pretty much saying the same thing: it's a fun game, that got most things right. I concur, and will simply round things out by mentioning a brief list of reasons you should get this game if you are a fan of Pokemon:

1) similar monster-collecting type of game, where you take a small crew out and find new monsters to add to the collection

2) gone are the annoying random encounters: here, you see the monsters as you walk around in a full 3-d over-the-shoulder perspective. So, if you scope a monster walking around you've never seen before, you can run after them to try and capture them

3) monster mashing: you can take two monsters and morph them in to a new third breed, leading to lots of new types to discover

4) a different story: one of the biggest complaints I have about the Pokemon series is how similar the events/story are from version to version. Here, you have something fresh to break things up.

5) you can grind to your heart's content until your monsters are sleek fighting machines.

6) lots of big environments to explore: 5 monster-laden Islands, each with several dungeons hidden within.

If monster capture/collection games are your thing, you don't want to pass this one up.