Super Smash Bros. Series

Smash HQ
Containing information, downloads, and secrets.
http://www.geocities.com/spyroo6/index.html

Smash Mansion
Fan site and community related to Super Smash Brothers. Fan fiction, animations, and discussion forums.
http://www.smashmansion.com

Super Smash Bros. Arena
Includes news, forums, polls, contests, media, character profiles, reviews, walkthroughs, records, and rumors.
http://smashbros.planets.gamespy.com/

Super Smash Bros. RPG
A forum based roleplaying game for the series.
http://www.ssbrpg.com/

Super Smash Bros: Unlimited Saga the Roleplaying Game
This a messageboard based roleplaying game where you can take the roll as a character and progress throughout the story that you make.
http://ssbrp.proboards32.com