I'll update with all these write-ups when I get home from work today. From what I see though, a few nitpicks:
Mr. Mime: "Be careful" is not good advice. How do you need to be careful? "Ha" is not a good way to describe a match-up. "Tier: High; if you can't trade Abra, you might as well use this." is confusing because Mr. Mime is obtained in a trade. Make it "if you can't evolve your Kadabra through trading, you might as well use this". Also pay attention to the format in the OP. "Stats that are really good" is also not very descriptive.
Grimer: looks good, it kind of reads like you didn't really use it since it has a lot of stat theory crafting, but I imagine it's somewhat accurate. Would still like to see it tested.
Caterpie: Can be a candidate for Mid, I think? Sleep Powder and Psychic attacks are really nice, but then again it does have a bit of a rough start.
Rattata: Absolutely needs mentioning of the Water Gun and Bubblebeam TMs. They let Rattata pick on Hikers and Cubones and everything, it's really nice. I also think this thing is Mid tier, STAB Hyper Fang lets it contribute all game long even if it's just taking on generics. It's a step above Butterfree, imo.
Vaporeon seems fine.