On November 23, 2011, the TaG was formed through a vote in the Bakugan Wiki, the Beyblade Wiki, and Redapedia. They are considered the founders, although the Bakugan and Beyblade Wikias are considered the official founders, as the idea had been put before their communities before. Around the same time, B-Daman Wiki was added, but is not considered one of the founders.

On December 31, 2011, the Monsuno Wiki was added by an agreement from the only admin at the time.

On March 25,2012, the Zhu Zhu Pets Wiki was added, doubling the size of the original TaG, from three to six.

On June 23-24, 2012, the Beanapedia, the Mechatar Wiki, the Gogo's Crazy Bones-Pedia, the Lalaloopsy Land, and the Chaotiki were added to TaG.

On July 10, 2012, the Huntik Wiki, the Magic: The Gathering Wiki, and the Magi-Nation Wiki joined TaG.

On July 12, 2012, the Magic: The Gathering Wiki joined TaG.

On December 7, 2012, the Slugterra Wiki joined TaG.

On February 11, 2013, the Xiaolinpedia joined TaG.

On May 20, 2013, the Scan2Go Wiki joined TaG.

On May 24, 2013, the Butto Burst Wiki joined TaG.

On July 24, 2014, the Battroborg Wiki and the Mysticons Wiki joined TaG.

On July 25, 2014, the Cross Arms Wiki joined TaG.