Pokemon War!
So, war has erupted in the Pokemon world. You decide to join the military of the region you are based in. You can have Pokemon that naturally appear in the land, and those only(If it appears in a part of the game you can't access until Post hall of fame(Not Kanto), then it counts as "Naturally found"). What region would you be in, and which Pokemon would you have? (Note, no Swarms, no Pokeradar, fair Pokemon that appear after Hall of Fame in areas you couldn't go to until then, no event or gift, and no legendaries). I would be in Sinnoh and have the following, and for the following reasons:
Magmar( can be caught in the wild naturally in Hugo Fireworks in Platinum)
Ah, a great tool of war. When this Pokemon breathes heavily, heat waves are rushed against the surroundings, lowering seeing opportunity. This allows blinding, and quick work of foes who can not see their targets.
Froslass(Evolve Snorunt, whom can be caught on route 218 in Platinum)
Such a fairly nasty piece of work. Froslass will appear suddenly after inducing the hail weather condition. After that, foes will be frozen in shock, the frozen for real, as horror pieces for the enemy.
Staraptor
My eye in the sky. This guy will take out air missions, and suddenly strike down on opponents hard. They won't know what hit em.
Gyrados
My terrifying terror. I will purposly have him take a few hits and allow it to go on a rampage. Down will go enemy encampments.
Garchomp
Now, the real damage dealer. This guy will tear homes down, do anything to destroy it's target. With terrifying speeds and extrodanary power, this thing is a killing machine.
Blissey
Who's to say my Pokemon won't get hurt. If me or my Pokemon get injured, Blissey will help, and serve as a Special tank.
Now, design your war team and defend your region.