Pros:

-Its Pokemon XD
-Nice little map with nice outer area.  I spotted the Lapras.
-Nice textures, about time a Pokemon map looked like Pokemon and not some ugly cave with the same texture throughout.
-Nice custom music for the Tank and making it pick out of 3 was a good plus.

Cons:

-Needs to be bigger, but that's because it looks so awesome.  You could seriously make a campaign based on the areas beyond Pallet Town.
-Add some ambience.

Conclusion:

Great little survival map.