From Mario Fan Games Galaxy Wiki

Penguinia was Retriever II's server where the MFGG forums were hosted before they were moved to Taloncrossing. MFGG moved to Penguinia after the previous host, Spitfire decided to stop hosting the forums due to "illegal content". Retriever II stepped in and allowed MFGG a Penguinia domain, and at the same time upgraded the forums from the VBulletin incarnation to the Invision one of today.

MFGG was eventually moved to Taloncrossing because of Penguinia's bandwidth limit, which was often surpassed monthly by the amount of people visiting MFGG.