While Poke_Master1 started off giving you advice, there is a lot more to be said. And I'm here to say it.
Really what you have here isn't much of a chapter. Half of it is dry description to introduce the characters. The other half is made up of the Pokemon starters list. So let's start with the basics and move right on up.
You need help with the grammar. As you can see in my review, every first word of every sentence is capitalised. This is good grammar, and can make it easier on your readers to read your story. The other problem that you are missing with your sentences is punctuation. You need to properly punctuate every sentence. Otherwise, your story just looks careless. And to be honest, if the writer doesn't want to take the time to make their story the best that they can, then the reader doesn't feel like they should take the time to read it.
For the mix-up of the "to/too": "too" is another way to say "also." "I want to go too" could be said "I want to go also". "To" is a preposition. "I went to the store." So if you get confused, ask yourself if you need "also" or not.
A big problem for me with this is the change in starters. There is no reason, I can see, for Prof. Oak to change what starters he gives out. According to canon law, he gives out Bulbasaur, Charmander, and Squirtle to the new trainers, no matter what their sex is. He also wouldn't be handing out a Roserade to a new trainer, as those Pokemon are strong. The starters are perfect for the new trainers because it doesn't take much experience to know how to work with them.
There also needs to be more description. I don't know what Kairi or Tori look like; I don't know where they live; I don't know what the school looks like; I don't know how they feel. Take the time to slow down your story to describe the setting and the characters to your readers. Doing so will immerse your readers into your world.
And yes, I said to describe the feelings of your characters. You want them to feel human, because readers connect with characters that feel. And if your readers care, then they'll keep coming back. So ask yourself how Kairi feels as she is about to head out on her journey. Scared? Excited? Nervous? Add this into your story. You want your readers to cheer on your characters, and by making them feel real, they'll keep coming back for more.
Other than that, there's nothing much more I can comment on. Even though I've read multiple "original trainer" fics, I still give each one a chance. So keep writing your chapters.
You might want to read through
this thread. It's full of useful information on writing, more in-depth than I could do so in a review.
Good luck to you.