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For one thing, hit the Enter button twice to make a new paragraph, so that there's a blank line between each paragraph. This makes it easier to read online.
Secondly, it got kind of bothersome to read when nearly every sentence in this ended with an ellipses. It made it seem as if the story was full of incomplete thoughts. My advice is to edit this and combine sentences in a better way, especially for the narration. You want the narration to tell what's going on in a sure way. So instead of
But Oak brought her a pokemon... A pokemon from Kanto... A Pikachu...
She wanted a pokemon like that... Since she saw Ash's Pikachu...
And the Pikachu befriended the others fast...
But Oak brought her a Pokemon from Kanto: a Pikachu. Juniper wanted a Pokemon like that, ever since she saw Ash's Pikachu. Juniper's Pikachu befriended the other Pokemon fast. Without that worry, Juniper decided to rest for a while.