Smash Bros. DOJO!! was launched around May 22, 2007. It is written in the form of a blog with information provided by Masahiro Sakurai. The site was updated every weekday with information on characters, how to play Brawl, game modes, stages, items, music, and other information relating to Brawl. The updates ended on April 14, 2008. However, Masahiro Sakurai noted "Also, there’s always a chance that I will need to update sometime in the future with some kind of announcement." To commemorate the release of the European version of Super Smash Bros. Brawl, Masahiro Sakurai made another post on June 27, 2008. But there is something strange. You can not see any info about the 'secret' characters. Thats too bad. Maybe they want us to check it ourselves by buying the game. Y'know, cause there secret. Wathever.
Warning! Challenger Approaching!
Before the January 31st release of Brawl in Japan, all characters that were newcomers to the Smash Bros. Series that were not already shown in the first trailer, had a banner above them saying "Warning! Challenger Approaching" when they were revealed.
Smash Bros. DOJO!! can be viewed in several different languages including Japanese, American English, British English, German, French, Spanish, and Italian. They all have the same updates and are translated from what Masahiro Sakurai posts on the Japanese site. It also has information on changed dates.