55chan was a Brazilian Portuguese bulletin board, founded by “K”, which ran from 2007 to 2010.¹⁾ 55ch was the successor that ran from 2012 to 2021,²⁾ notably taking the old domain in 2015. It was significant, alongside BRchan, but started the trend of enforcing 'proper' grammar.

In 2007, “K” sets up 55chan at “55chan.org”, in reference to Brazil's country calling code, using Kusaba X around May 18, 2007. However, the earliest mention of 55chan was July 23, 2007³⁾ and the database was reset on November 11, 2007.⁴⁾ It was fairly populated, then the host flagged 55chan for copyright infringement and took out the website around late 2010,⁵⁾ so most of the refugees migrated to BRchan.

On October 8, 2012, 55ch is set up at “55ch.org” using Kusaba X,⁶⁾ but didn't gain any traction until BRchan's death on April 19, 2013, and some of the former BRchan staff would then join. In 2014, an 8chan refuge was set up,⁷⁾ then 55ch switched to Tinyboard on December 3, 2014.⁸⁾⁹⁾ Then on August 5, 2015, 55ch would stop and redirect its users to Shii's Song with Brazilian Portuguese subtitles.¹⁰⁾

The staff later revealed that they acquired “55chan.org” around October 12, 2015 and later shared its servers with SFChan. For some reason, 55chan had a lot of internal staff drama, so 27chan became a refuge, then came the bizarre triumvirate decision in late 2018. In 2019, they made the Vichan fork SS. In 2020, 55chan announced its shut down on January 15, 2021,¹¹⁾ so most followed SFCchan to 1500chan.

• 55chan had two official mascots. Please note that Kuruminha belonged to BRchan.
  • Favelito - A curly-haired black man with two short-barrel firearms and a soccer ball, rumored to be an Argentinian joke submission for the 2014 FIFA World Cup's mascot.¹²⁾
  • 55-tan - A twin-tailed black girl with green hair and blue eyes, and wears the national flag's colors. She bears a resemblance to Sari Sumdac from Transformers: Animated.
• The website enforced 'proper' grammar to weed out 'potentially underage' users from Orkut.
• If it needs to be pointed out, 55chan was not literally made in 1997, as edited news posts would imply, and the year was more of a 'nostalgia' thing, which has been a recurring theme.
• On January 12, 2021, 55chan tried advertising Favelachan before closing,¹³⁾ but it was a disaster.

• 55chan [Archive] - The front page of 55chan, archived January 15, 2021.