That world sounds like a lot of fun. Unfortunately, there are a lot of issues I have with how you delivered the world's situations, but I'll get to that later. First things first, how about some nitpicks?
It was a time of battle and destruction between Pokemon and people,when children were sent in the forest to kill pokemon and torture them.People were burning the Pokemon forests and every Pokemon was dieing in vain and sadness.
You need to put in a space between your sentences, like what I'm doing here. See? There's a space between the period and the next word. You should fix that, otherwise it gets hard to read. In addition, you need spaces between your paragraphs.
Just like this. There's an extra space, so it's easier to read as well. You have no idea how hard it is to read a giant block of text.
Anyway, why are children forced to kill Pokemon? What's wrong with adults? Logically, adults would go out and shoot Pokemon rather than children, because adults are more capable and fit the bill. Children wouldn't kill Pokemon to begin with, if you think about it.
Once a boy was sent in the forest to
find and torture his first pokemon but
he was thinking with his pure soul, how can he do something like this.
Yeah, this only adds to my reasoning about why adults should be doing the Pokemon-murdering rather than kids. That's a daunting task to put on ten year olds.
The second bolded bit (he was thinking with his pure soul) is a bit repetitive when you put it right next to 'how can he do something like this' (which needs a question at the ending punctuation rather than a period). When you introduce the thought of doubt for the child, it's implied that he is somewhat pure or has a standard of morality, which seems to be lacking for the rest of the population.
Almost crying,his tears were pouring down in a small river
untill a little lovely pokemon jumped out of the water... yes, it was a
cute small Oshawott!
'Almost crying' doesn't mean he's crying. Take out the 'almost' so this sentence makes sense. And 'untill' is actually spelled as 'until.' Also, 'cute small' needs a comma in between them.
When they saw each other,they already felt the bonds between each other
,it was the strong connection between two parallel rivers (the child with a pure white
sould and the calm lovely Oshawott)
The bolded 'it' has a comma before it, which is grammatically incorrect. It actually needs to be a semi-colon or a period, because it separates two independent clauses. An independent clause is a single thought that can stand alone as its own sentence.
I don't see how they bonded almost immediately after seeing each other, because Oshawott would probably run away due to the current circumstances, and it's a bit hard to develop a bond with a complete stranger, especially with a stranger intent on torturing you.
'Sould' isn't a word.
they started loving each other more and more and created the bond of two
in a single...
To be continued.
'In a single' just sounds weird, because it sounds like you need an additional object. 'Into one' would be a nice change. Also, I have no idea why you said 'to be continued' because that's implied with the whole part 1 bit.
That aside, the world itself has a few problems, which is made worse because you don't explain anything. There needs to be more explanations, because people don't suddenly walk up and start stabbing Pokemon to torture them. Obviously, it's traditional, because the boy is forced to go into a forest, but you fail to explain that. There needs to be some sort of description or a background, otherwise, you'll just confuse readers. And you've already confused a reader, so yeah. With a lack of coherence in your story, you spurn a lot of readers away so they don't continue to read.
Also, your story contains a lot of grammatical and spelling errors. Run your story through some word processor with spell check (like Microsoft Word if you have it). You'll minimize your mistakes if you read your story through all the way. Make sure it's perfect.
I'll try to see how this story turns out.