[2] The convention typically offers anime rooms, art show and auction, concerts, contests, a dance, a dealer's room, demonstrations, industry guests, LARP, masquerade, panels, video games, and voice actors.
[2][3][4] The convention was started by members of an Mallets, Etc., a Houston-based Anime Club.
[2] Oni-Con 2004 was held at the Sheraton North Houston at George Bush Intercontinental.
[9][10] The convention started a fundraiser in July 2020 for voice actor Chris Ayres, who was suffering from serious health issues.
Communication issues affected the convention including cancelled panels and running out of lanyards.