"I saw you have done a lot of changes on Eevee's skills(and from what I figure on its evolutions as well, since my Umbreon didn't learn Pursuit) and then I get the De-stone!

So my question is this!
Was I supposed to NOT evolve Eevee?
Will it affect the game's script in some way or another if I don't have Eevee with me?"

I'm sorry for making Umbreon not learn Pursuit, I should have really spend time writing down the moves it originally learns because I wanted it to be able to learn the original moves + some new ones as well.

About evolving Eevee, there is nothing wrong about doing so but you can de-evolve it anytime you like with De-Stone and change to something else. Also it doesn't matter whether you carry Eevee in your party or not (although I may add some Eevee-related special script in the end of the game but for now there is no such thing).

I read your post in my Dark Future thread, it was a very nice post indeed!
I liked how you actually took time in making it and to tell the truth, I'm not that satisfied with the beginning either (from the start till getting Woolly Hat).
Anyway, I'll quote you to the thread later today when I've more time to