Ideas for Intro to Competitive Battling

[Amethyst 2466]

There are already a few people who could use such an article, and I know many more not around the site who would want such a thing. However, to make sure I cover everything, I'd appreciate it if everyone could just post a couple things that I need to address.
For starters, the obvious

EVs
IVs
Natures
Roles
Common Items
Tiers
Some common types of teams (rain, troom, etc)

So anyone, chime in with anything else. It can be as comprehensive or light as we want. Also, if anyone wants to help me put it together, I would greatly appreciate the help.

[Stars 0]

I think you've got just about everything important except for Egg Moves.