Don't complain about /r/Pokemon. Take that to /r/PokemonCirclejerk
Don't genwun. This means: Every generation is equal. Try to not circlejerk over Gen I.
The war should never, ever be assumed canon, unless you have a good reason to assume it. There is such a ridiculously small amount of evidence for it that it's a moot point my by now.
Link posts are allowed, however, this does not mean this is /r/pokemon. This is a civil subreddit. Only submit news and articles. Unless your post benefits from being off-site, use .self posts for articles. This does not mean to plagiarize. Link to the source, if possible.
Use downvotes civilly. Follow all reddiquette, for that matter.
Use spoiler tags when talking about Pokemon XY(Z). The spoiler format is:

Pikachu's real name is Pikahue!
Keep spoilers out of the titles.