where Nickelodeon installed a "Fan Wall" to display messages from worldwide fans. In October 2018, an exhibition for the series' fifteenth anniversary was held at Europe's largest comics festival, the Lucca Comics & Games convention in Tuscany. Federico Vercellino of Il Sole 24 Ore described the series as "a destructive and constructive phenomenon" that introduced viewers to feminist stories about rebellious female characters. A 2019 study conducted for the Corriere della Sera reported that Winx Club was the fourth-most-popular Italian series outside of the country, with strong demand in Russia and the United States. In 2018, Giovanna Gallo of Cosmopolitan stated that the program's characters have become "real icons of fashion" and noted the show's popularity with cosplayers, performance artists who wear costumes and accessories to represent the show's characters. Winx Club costumes were the focus of a second-season episode of The Apprentice, in which Flavio Briatore challenged the show's teams to create three Winx outfits intended for females 25–35 years of age, which were to be submitted to the judgment of Iginio Straffi. la Repubblicas Marina Amaduzzi attributed the popularity of Winx-inspired fashion to fans' desire to emulate the characters, stating that "Winx fanatics dress, move and breathe like their heroines". The Regional Council of Marche, Italy, chose the Winx Club fairies to represent Marche and Italy at the Expo 2010 world's fair in Shanghai. A four-minute video using stereoscopic technology showing the Winx in Marche's tourist destinations was animated for the Italian Pavilion. In 2015, Italian Prime Minister Matteo Renzi visited Rainbow's studio and wrote that "the Winx are a beautiful story of Italian talent". Lawsuit In April 2004, The Walt Disney Company filed an unsuccessful copyright infringement lawsuit against Rainbow. The company accused Rainbow of copying the Winx Club concept from its W.I.T.C.H. comic book, which was published over a year after production on Winx Club began. Disney applied for an injunction order to halt the further release of the Winx Club series and comic magazine; to declare the Winx Club trademark invalid; and to seize the periodical and film material bearing the allegedly infringing Winx Club name. Rainbow won the case against Disney, and the judge declared there were no confusing similarities between the two. Straffi mentioned that the Winx Club pilot entered production by 2000, while the W.I.T.C.H. comic was not released until May 2001. On 2 August 2004, all of Disney's infringement claims were