Bertso Derbi XXV was a campaing presented by the Real Sociedad Fundazioa to the students of Usandizaga Design to promote the event. The idea was simple, to transmit the idea of a cultural gathering, full of equality and partnership. Basque Football and bertsolaritza mixed in one place. Play all along while they get happily drunk in culture. To transmit those ideas, the character Derbitxo was designed as the main image of the campaing. Created by two lines, Derbitxo loves imitating his favourite football players and bertxolaris.

Derbitso is created with two lines that play together, mixing and entwining to create thousands of new imaginable forms. It loves taking the posture of footbal players and bertsolaris.