Story: God, there were none. You wake up from Dreamland, and you walk for like 1 sentence and then you meet some random wild Pokemon and you catch it. Makes sense? No. Read the story writing rule, you need to have at least one FULL post(So, at least 6 times of that).
Grammar: Errors here and there, and separate your story into paragraphs, please. Capitalize the P of Pokeballs, Pokemon Centers and other words with Poke/Pokemon in it.
Details: You barely described how you ran, how you felt when you met the Pokemon, and what else happened on the way to the forest. Try describing them.
Reality: Fine, you meet a Pidgey from nowhere, I guess that's fine cuz Pidgey's aint that rare neways.
Battle: 2 direct hits and thats it. Right... You can't always have the advantage, it makes the story boring. Pidgey can fly, and can escape, remember? Try some ways to make Pidgey trapped and stay, so you can battle and catch it.
Outcome: Pidgey not captured!
Comments: You can catch a rubbish can with this, though. Give it a shot