55chan was a Brazilian Portuguese bulletin board that was established by “K” and ran from May 2007 to October 2010. 55ch was their successor which emerged in October 2012, took the old domain in October 2015, then announced its shut down on January 15, 2021.

On May 18, 2007, “K” establishes 55chan at “55chan.org”, referencing Brazil's country calling code of +55, and they used Kusaba X. The website was made after BRchan, but was considerably more popular, which doesn't necessarially mean it was good. 55chan had a reputation of being a strict place, yet memes like Dogola emerged. Then on October 2010, the host deleted the website over copyrighted material.

Most users fled to BRchan, then somebody set up 55ch at “55ch.net” with Kusaba X on October 8, 2012, but didn't have any traction until BRchan's death on April 19, 2013. Some of the BRchan staff moved to 55chan, then server issues started popping up, so they would switch from Kusaba X to Tinyboard on July 22, 2014, and set up an 8chan refuge on September 22, 2014.¹⁾

55ch would manage to outlive most of the post-BRchan competitors by 2015, then 55ch went down on August 5, 2015 and redirected users to a Brazilian Portuguese subtitled Shii's Song.²⁾ It was then revealed that the staff bought the old “55chan.org” domain on October 12, 2015, resuming operations as 55chan and sharing the servers with SFChan. On the other hand, some argue that this was when the 'decline' started happening.

Some moderator drama occurred, 27chan was made as a refuge, then 55chan made the bewildering decision to cut down staff to a triumvirate in December 2018. For 2019, the staff forked Vichan into SS. Then on October 1, 2020, 55chan announced its shutdown on January 15, 2021,³⁾ so most users would follow SFChan to 1500chan, then 55chan started promoting Favelachan which went poorly.⁴⁾

• 55chan has a total of two somewhat recognized mascots and neither of them are Dogola.
  • Favelito - A black man with curly hair, two short-barrel firearms, and a soccer ball. It's believed that the design was an Argentinian's joke submission for the 2014 FIFA World Cup's mascot.
  • 55-tan - A twin-tailed girl with green hair, blue eyes, and wears the colors of Brazil's national flag. It might've been based off of Sari Sumdac from Transformers: Animated.
• The website has a policy enforcing proper grammar, and those who break this rule were banned under the assumption that they were underage and told to return to Orkut (2004–2014).

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