The easiest place is the sneevil forest.
For all thepokemon natures and what stat they help visit bulbapedia.bulbagarden.net and search for natures.
Light has two natures that can be thought of as both a wave and a particle.
decomposers
I would suppose so, but due to both Knuckles' and Shadow's independent natures, it would be more fitting to call them "allies".
Pikachu Natures For Male: Brave Pikachu Natures For Female: Hasty
Natures Way is a large manufacturer of natural and herbal remedies. Natures Way has many herbal products such as vitamins and supplements to herbal medications.
Jesus possesses two natures: a divine nature and a human nature.
there is no nature
decomposers
I am!
There different natures of art which are commonly referred to as art genres. Some of the common natures of art include drawing, painting, digital graphics, ceramics, sculpture and much more.
Natures (not JUST in Pokemon Diamond) give your Pokemon one stat boost, as well as one stat hinderance. For example, Adamant increases attack and reduces special attack. Some natures don't have ANY effect. If you need a chart for natures, I have one made here: