First of all, welcome to PC! I hope you have a wonderful time here and stick around for a while.
Beat t through a ball and out came a tiny red bird that chirp Torchic.
There's an extra "t" at the beginning the the sentence. Also, I'm guess you mean "threw" instead of "through". "Threw" is the past tense word for throwing something, like a pokeball. "Through" is used when someone is passing through something, such as a person walking through the park.
"Beat since you think your so smart enough for you to fall asleep please answer the question on the the board."
This sentence sounds a bit awkward. I think you went into this sentence following one expression, and then ended with a different one. Try reading this sentence out loud to see if you can pick up on it. Also, you used the wrong form of "your/you're". "Your" is referring to possession, such as someone saying, "This is your ball." "You're" is what I think you're after, as it's a contraction of "you are".
".I didn't think you did. normally I would get you extra homework Beat but since it Friday I'm going to let you off easy." "Ok class is dismissed and have a good weekend.
A few things here, there's an extra period at the beginning of the sentence. You also forgot to capitalize "normally" as it's the beginning of a sentence. Since it's the same person talking, you don't need the extra quotation marks in the middle of the dialogue. You also forgot to put an ending quotation mark at the end. "Ok" is slang for "Okay". I would recommend using the full word.
Okay, I think what will help you the most right now is proofreading. There were a few mistakes that I feel would be easy to catch if you went back through and read your story for errors. Let your story sit for a day or two, and then go back and read it. It will help iron out those simple grammar mistakes. No one can catch everything, but try your best.
Another thing I noticed is your dialogue. The formatting is off. You need a space separating different people's dialogue and description. Since I learn best by examples, here's what I mean.
"Beat since you think your so smart enough for you to fall asleep please answer the question on the the board."
Beat look the board and all he saw was chicken scratch.
"I'm sorry I don't know." he mumbled
".I didn't think you did. normally I would get you extra homework Beat but since it Friday I'm going to let you off easy." "Ok class is dismissed and have a good weekend.
Beat grab his backpack and dash out of the school to home.
It helps make the text look more inviting to read and helps the reader differentiate who's talking. Remember to hit that enter button
twice on here to get that full space.
One thing you're missing is commas. Just to let you know, commas are the bane of writers everywhere. Since it could take hours to write out all you need to know, I'll just let this site take care of it:
https://owl.english.purdue.edu/owl/resource/607/02/
Something that isn't in the rules is the length of chapters. It's not in the rules simply because it's more of a suggestion than anything, but I feel like it applies here. I want you to work on this first chapter some more and make it longer before you work on the rest of it. It's a little picky, I know, but it's just something that I would like you to do.
Overall, this isn't a bad start. I know this is your first pokemon story, and you don't have a lot of experience, but it's not that bad. The best thing to do right now is continue writing and to try to apply the things I told you. Once you do that, your writing will be a lot stronger. Good luck and welcome to PC! :D