An interesting idea to be sure, and I'm looking forward to see how this plays out.
Several weeks later As I watched the news and saw a Rocket Grunt cursing a kid who single-handedly revealed a casino being a front for a secret hideout for Team Rocket.
The "As" shouldn't be capitalized as it's not a proper name of a noun. You're also missing a comma, but more on that later. I do have a problem with the way the sentence is set-up. With the "as" where it is, it makes it seem like the next idea is just going to be a small footnote. However, the next idea is what the whole sentence is about. I would recommend dropping "as" and rewording the sentence a little bit.
His adventure didnt end there..
You need an apostrophe in "didn't". Also, you need just one more period for that ellipses to be an ellipses.
...himself was all over the news, He helped the Police arrest many...
That comma needs to be a period.
and a red hat flew to me from Its back.
The "Its" doesn't need to be capitalized for the same reason as before.
I picked It up and suddenly a boy stood before me and silently took the hat from me. He smiled at me, pat my head and moved on.
The "It" doesn't need to be capitalized as well. Also, you switch tenses. With the majority of the sentence being in past-tense, "pat" doesn't belong since it's present tense. I would recommend just switching it out for "patted".
And then Ive finally learned his name... Red
You're missing an apostrophe in "I've".
That's all I could see right now, but I did notice a trend. You're not using punctuation where it needs it past periods. You're missing a lot of commas and apostrophes. Here's what I mean:
After all I was a resident of Cinnabar Island and without knowing all the details I just assumed he was a bad man since he took one of the fossils found by my BROTHER!
With commas, this sentence now looks like this:
After all, I was a resident of Cinnabar Island, and without knowing all the details, I just assumed he was a bad man since he took one of the fossils found by my BROTHER!
Just try to remember where they belong. If you're confused about where they belong, I will go into more detail later, since it's getting late and I really don't feel like explaining it right now. :P Don't worry, if you're confused, I'll be more than happy to explain it once I have more sleep.
You're also missing a lot of description. I know it's supposes to sound like the speaker is telling you the story, but it could use more substance. I'm sorry, you've fallen into a bad time for this since I just got done with a huge report on a book that all the events are being told through a five year old's eyes in the same manner as you're doing it, so I'm going to be comparing your story to a published novel. Isn't that great? :D Okay, so I know what you're going for, and you're doing a good job of it so far, but there needs to be a little more detail and voice. Most of it sounds like it's being told to us by a person, but there are some parts that sounds like you're telling us without a person speaking it. In other words, the voice isn't as strong in some areas. Here's what I mean:
My brother came back from his trip with a helix fossil and to my surprise he wasnt mad that a kid stole one of the precious fossil he worked hard to find. His view of it really made me curious.
The voice here was really good and prominent (there needs to be a comma in there, but whatever). However, the same can't be said about this:
A legend of a boy who went head to head against the Rocket Boss himself was all over the news,
This doesn't sound like a speaker is telling us. You lost that voice that you had earlier. In order to try to get it back, try to think of things that we use in dialogue everyday that we don't use in writing. What kind of slang do we use? Are there any quirks about this specific character's speech? What I mean about that is that you could tell almost immediately that the speaker was very young in the book that I had to do for that report. The author did this by having the book use words like "forgetted" just like a little kid uses it. Just like, "Ma forgetted to do something". This gives the book a strong voice. I think, the same strong voice you're going for. Maybe not through the eyes of a little kid, but hopefully you catch my drift.
I'm probably missing a couple of things since I just decided to check in on PC right before I go to bed and now I'm reviewing a story. In other words, I'm tired! Just be sure to give that prologue a proofread or two.
One thing I should also mention is that the prologue is a little short. I would highly encourage you to make you chapters a lot longer than that. It's fine since it's just a prologue, but just thought I would let you know that I like chapters to be longer. ;)
As far as the plot goes, I like it. It's a unique twist to have the main character obsess over the main character from the games. Normally, it's just the, "New Adventures of Red", but I like how you're focusing on how someone else sees him. I can't speak much on the plot since it's just retelling the game at this point, but I'm a fan of the concept. I can't guarantee that I'll read later chapters, but I'll definitely try my best to remember. Good job so far and I hope I helped! :D