Pokémon fans headed to the PAX gaming conference in Seattle suffered a disappointment on Thursday when their scheduled party didn't materialize. The reason? Copyright lawyers working for The Pokémon Company saw the whole fiesta as a giant festival of infringement.

Company lawyers got wind of the unofficial party, which was advertised on a poster (above) that included two characters from the Pokémon universe: Pikachu, the most famous character (or Pokémon), and the dragon-like Snivy. On Wednesday August 26, one day before the party, they sued (PDF) to stop it.

"Defendants boast that the '5th Annual Unofficial Pokémon PAX Kickoff Party' will feature among other things, 'Pokémon themed shots and drinks - Smash Bros. Tournament with cash prize - Dancing - Giveaways - Cosplay Contest and more,' and an “AMAZIN POKEMON MASHUP," the complaint reads.

The lawsuit names two alleged party organizers, Ramar Larkin Jones and Zach Shore, as defendants along with their company, Ruckus Productions.

The event was already sold out at the time of the complaint. According to Geekwire, which first reported the suit, the even was quickly canceled. Jones and Shore couldn't be reached for comment. The event's Facebook and Eventbrite pages have been taken down.

The Pokémon party has happened at PAX each year since 2011, but this is the first time legal action was taken over it.

Elsewhere, there are "official" live events associated with the Pokémon universe, like championship tournaments for the trading-card game. The company notes in its lawsuit that domestic sales of Pokémon merchandise exceeded $6 million in 2014.