The pony changed to a pony she thought like Twilight she would never meet again. There standing right before her was the princess of the night herself Princess Luna. Rainbow Dash remembered that she could enter dreams but there was one question on her mind why now. Hello Rainbow Dash she greeted with a friendly face however Rainbow didn't have a smile or the looks of a friendly face in fact she had quite the opposite of a friendly face but that of a diamond dog who had all his gems stolen she had the most angriest face that Luna had ever seen.
Before Rainbow could speak Luna explained "Rainbow dash I don't have much time here so don't interrupt me and let me get to the point I believe you when you say that you are innocent and i'm not the only one either some of your friends also believe in your innocence after I explained to them so let me say that the pink one may have hidden something in the treat when Twilight was not looking I don't know what it is in it myself just something that can help you escape when you do escape you should find yourself in the frozen north there should be a map outside the gates once you are out follow the map to the castle of the two sisters but be warned my sister will know straight away that you have escaped so try and avoid attention I have to go now once I am gone you will wake up escape when you want to but make it quick there is a storm coming and I think that we should be prepared for it".
With that she disappeared before rainbow could ask any questions and soon after she found herself waking up.
My thoughts on chapter 3:
1. Waaaaay too short to be a chapter.
2. Again, improve on grammar. For example, "she had the most angriest face," is not good grammar. It's, "she had the most angry face."
3. There are better ways to describe things. Like instead of saying "she was angry", try describing her looks or some other more unique descriptions like, "her voice was laced with venom."
4. Try to focus on separating sentences. Please. Otherwise it gets hard to read like this Then you can't really tell when the next sentence is and it gets really annoying to read See, it's annoying It's only not as annoying because I'm capitalizing every new sentence.